If you haven't already got one, head over here and pick up an mbed board for a small sum of money. With it you can:

• Play with a real piece of ARM hardware
• Write code in C/C++ using a web-based IDE
• Develop software without installing any tools on your computer
• See what lots of other people have done with this great little device
• Have a program running in under a minutes (yes really!)
• For US$59 it has to be one of the lowest cost ways into ARM

This unit is very similar to the Snapper UDIP module we created a few years ago, but the bug innovation is that you don't need to worry about tools. It connects to your computer over USB and you interact with it via a web site.
Sorry, we don't sell these, but see here for lots of options in various countries.