Any or all of those items would be great.
Router - I'd replace my very old WRT54G. A great router in its day but the lack of n speeds is becoming a bit of a problem.
Keyboard - I'd use for the htpc. We currently only have 1 usb keyboard and my wife keeps stealing it to do her work. To be honest, if we won that one, I would expect the current one to be left alone and the new one would be the one she uses.
Books - Great to read to my kids. May even send them to sleep :-)