You might want to speak to Apple about this. They guarantee their batteries (maybe not for longer than a year, mind you) and it's not normal that you have such trouble. It may be worth spending the money to get the battery replaced. Good luck.
I took it to the genius bar. They told me it was out of warranty and the repair would be $299. That would put me at over $1900 total for the laptop, and I'm just not inclined to throw good money after bad. Apple's own spec is 80% charge up to 1000 cycle count, so I was obviously sold a lemon, and I don't plan on paying a retail price to replace the lemon part. I had seen previously where battery replacement was supposed to be $199, not sure why I was quoted the $299.