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Have you ever sent an email and instantly wished you could ‘un-send’ it? While this may be a rare occurrence for most people, it does happen from time to time.

The ability to un-send an email in Gmail has been available under the ‘Labs’ settings for a while now. Previously, you were allotted 5 seconds to un-send an email. Google has just improved this feature by allowing up to 30 seconds to un-send an email.

If you are a Gmail user, I’d recommend activating this feature for peace of mind.

1) Login to your Gmail account in your web browser

2) Click the green beeker between your login ID and the “Settings” link in the top right of the webpage

3) Scroll all the way down the list until you find “Undo Send” and click the button next to “Enable”

4) Click on “Settings” located at the top right of the webpage

5) Scroll down to the settings for “Undo Send” and set the timing to 30 seconds

6) Scroll to the bottom of the webpage and hit “Save”

Once you follow these steps, Undo Send will be enabled for your Gmail account.

PhoneAble is an application available to Windows users who would like to sync their iPhone with multiple iTunes libraries. This application can be very useful as it allows you to sync your iPhone with other computers in your house, at work, or with friends and relatives.

How it works: Sync your iPhone with the iTunes library on your main computer. Then install PhoneAble on any other computers you would like to sync with. Once you run through PhoneAble’s setup process, it will set the library key in each of the iTunes libraries to coincide with the key on your iPhone. Now your iPhone will recognize all of these iTunes libraries as your main library, thus allowing you to have a much wider music collection available on your iPhone.

You can also follow this guide or use programs such as CopyTrans to transfer music you’ve taken from various iTunes libraries with your iPhone and back them up to your main computer.

Personally, I’m hoping PhoneAble will be available for Mac users in the near future. I can see myself using its capabilities regularly.

Apple Trackpad

Along with the refreshed iMac and Mac Pro lines, today apple also revealed their new Magic Trackpad. The trackpad found on the Macbook Pro provides two-finger scrolling, pinch to zoom, finger tip rotation, and three and four finger swipe functionality. The Magic Trackpad has all of these capabilities as well as 80% more surface area than the trackpad found on the Macbook Pro.

This is a perfect upgrade for iMac and Mac Pro users who want the multitouch functionality that Macbook Pro users experience. You can purchase the Magic Trackpad for $69.

UPDATE: If you are a Windows PC user and the Magic Trackpad appeals to you, follow this step by step guide to get the full functionality of the trackpad on your Windows machine.

iPhone 4

Apple held a press conference this morning to discuss signal issues with the iPhone 4. While many people were hoping for a recall, Apple gave its own “solution”. Steve Jobs announced that current iPhone 4 users will receive a free case from Apple. And those who already bought a Bumper can take their receipt back to the nearest Apple store for a full refund.

Steve Jobs spent majority of the press conference defending the signal issues on the new iPhone and stated that “every smart phone has this issue.” He even went as far to say that replicating the “death grip” on the Blackberry Bold, Droid Eris, and Samsung Omnia II causes the same signal issues. As expected, RIM and Nokia have responded to these careless statements.

It’s a bit ridiculous that Steve would make this statement since it’s not a wide scale problem on all of the above mentioned phones like it is on the iPhone 4. And it’s even more absurd that Apple is now comparing the performance of their most “revolutionary phone” to other smartphones that they have previously labeled as lesser quality.

I think it’s safe to say that Apple has lost a lot of credibility with consumers thanks to the way they’ve handled the issues with their latest phone.

If you own a mac, the below software can be extremely useful.

1) smcFanControl (Free)

- This freeware allows you to increase the internal fan speeds on your mac. Increasing your fan speed from the standard 2,000rpm to 3,500rpm can decrease your computer’s internal temperature by over 30 degrees Celsius. I’ve used this software on all three of my previous Macbook/Macbook Pro’s and recommend it to everyone I know.

2) Dropbox (Free | $10/month | $20/month)

- Say goodbye to carrying flash drives and/or having to VPN into your work computer to access important files remotely. Dropbox is an excellent web based hosting service that allows you to store your files online so you can view, download, and upload them from any Windows, OSX or Linux based computer. There are apps available for the iPhone and Android phones that allow you to use this service on your phone as well. You can utilize Dropbox to store up to 2GB of your files for free. You also have the option of purchasing 50GB of storage for $10/month or 100GB for $20/month.

3) Little Snitch ($29)

- Network monitoring software that runs in the background and allows you to monitor, track, screen, and block unwanted information from getting in and out of your computer. This can be useful if you dislike websites or software trying to collect your information and sending out behind your back. After you start running Little Snitch you’ll be amazed at how many hidden connections are made without you knowing. It’s especially useful for those who may not necessarily pay for all of their software, if you catch my drift.

4) Phone Disk (Free until Sep. 1st 2010)

- This software is pretty simple, yet much needed. The downside to having an iPod or iPhone is the inability to plug it into your computer and explore it’s contents like an external drive. Phone Disk allows you to plug any iPhone/iPod into your mac and drag pictures, movies, and music from it and drop them directly to your computer’s harddrive without the use of iTunes. Thanks to Phone Disk, It’s now possible to copy all your friends’ music from their iPhone/iPod just by plugging it into your mac.