Didn't think I would reply, did you?
What exercises? Well, the best place to start is probably your forearms. Wrist flexors and extensors work equally hard to keep you on the wall. There are a lot of devises that will assist you in strengthening these eg. powerball http://www.powerballs.com/
, Metolius gripsaver plus http://www.metoliusclimbing.com/product ... aining.htm
Instead of investing in these, a fingerboard will be your best exercise device I would think. Doing old fashioned pull ups on these or just anthing else really will help condition your upper body. just remember that climbing is not just about the strength of your biceps, you use your legs just as much and need ++ core strength to build up enough body tension to keep you on the rock. Apart from strength, you need a lot o flexibility too. Just Google climbing training and you will have more than enough exercises to keep you busy. In the end your best bet would be to just get out there and climb as often as possible, focusing on overhangs where extra strength is needed.