driftwoodhunter HD Blazingwolf - You might consider a less involved method that can be done on smaller scale. This is a video about the Floating method. http://www.youtube.com/watch?v=e3imrVkIUhg
On a small scale I think herbs would do the best. If you could design a way to float a sheet of compressed coco coir, you could grow sprouts. Lettuce does need a bit more light, but it is possible.