I was really excited to hear about your solar solution, but no so excited when I noticed you didn't give us any information like, the actual parts you bought and how you mounted them and so on.
People please if you are going to take the time to come on the forum and say "Hey, I solved that problem". Could you also take the time to tell us how otherwise it isn't really as helpful.
Since he mentioned that I got really excited, so my first reaction was to go to ebay, and there are LOTS of items when typing "USB solar"
Here's one.
http://cgi.ebay.com/USB-Solar-Power...39:1|66:3|65:12|240:1318&_trksid=p3286.c0.m14