Here are a tutorial of Atmels at91sam7xxx or phillips lpc21xxx . I just got it work it was simple just like starting with pic or avr. Schematic and 2 nice Tutorial with images and source samples . Color TFT LCD, Ethernet server, usb,can...... you name it !!!!!
I use this board http://www.sparkfun.com/commerce/product_info.php?products_id=8244
But you dont need it there are schematics. I use a Jtag programmer. I am planing to build a pda or mobile phone or something.....
If you need help just email me.
I cant help you with C I am newbee and hope there will come some experts!!!!!!!
But I can help you setting it up and flash it an get something on the screen and flsah a led
The board i have is a sam7ex256 maybee look at www.olimex.com
they build some nice development boards.