If I were you, I wouldn't try to jump right into uCLinux on a new board. I would start small, with something like "Hello World" or "Count Binary". Be sure that all of your major interfaces (flash, RAM, etc.) function before moving on to anything more complex. There's even a provided example for testing the flash and SDRAM, though you'll have to modify it, slightly, to get it to fully test your system.
It's like building a wall. You wouldn't want to add another layer of bricks to something that isn't solid, would you?
Best Regards,
- slacker