Hello, I am Andrew, your friend, possibly enemy, or maybe aquaintence here at Macosx.com. Someone once told me where some of my missing hard disk space went. I was missing quite a bit. It is because of your Cache. Luckily I have found a little app that CLEANS your cache, and frees an amount of your disk space from the clutches of evil. You can download here, from version tracker:
http://versiontracker.com/dyn/moreinfo/macosx/16494
Just download it, click demo, and save your disk space from evil CACHE!!!!!
You don't need Cache, it's just useless files that are made for absolutely NO REASON!
Good luck,
Androo.