This has never happened to me in all my time of owning my iPhone, but the screen completely locked up on me. I wasn't sure what to do, but I tried holding down the power button and then the home button for a few seconds and it forced the phone to shutdown. This doesn't seem to be very well documented so I thought I'd share!
So, if your iPhone ...

I recently came across the best free solution for transferring music from your iPod or iPhone to your Mac. I have tried lots of programs and this is by the far the easiest way to get music off of your iPhone or iPod and on to your computer without paying for an application.
All you have to do is download this great app called ...
March 13, 2009 – 11:34 am

I finally tested something last night that I have been meaning to do for awhile now, *
Airfoil.
I have never understood why Apple unlinked Front Row playback from iTunes, thus disabling the ability to play music in Front Row through your Airport Express with airTunes. With the updated Front Row app in Leopard, this was no longer possible. Luckily, a great little application called Airfoil is here to save ...
February 27, 2009 – 10:01 am

A great iPhone application called
BeeJiveIM allows iPhone users to send SMS text messages to anyone they want absolutely free!
This app is basically a glorified version of the free AIM app. It is an instant messaging program at heart that allows you to send and receive text messages using an AIM account. The true beauty of BeeJiveIM lies in it ...