I'm starting a new hardware design using the Technologic Systems TS-7400 'system on module' single board computer. Why the TS-7400? Fast boot times, I/O, price and support. When I first powered up my 7400, I got a prompt in a couple seconds. Thought it was the bootloader, nope busybox. The 3 boot modes come up really fast, good enough for my projects. There's 2 extremely simple interface 0.1 headers, great for breadboarding. At $130, with low +5V power consumption, its a winner. Technologic Systems offers great, and I mean great, support. When you call them, a friendly person answers the phone, who immediately redirects your call to an informed person, yes someone with a serious clue. OK, enough about that.
Start Here by reading my trac site's ts7400 README.txt file.
my trac site
http://www.embeddedlinuxinterfacing.com/article.php?story=20080529112945339