I bought some cheap ($25?) Nashbar panniers for one of my other bikes. I dont see it on Nashbars website right now, but you can see my picture of it in post #1803.
They are kinda small. They are good for little things though and hold probably more than a backpack. They are not the best in the world, but are good enough to convince me that maybe one day I might wanna get a good set of panneirs. I just didnt wanna spend $100 or whatever on a good set (fer a $60 bike) and decide I didnt like them.