Go for it. I quit last September. After the first week it's a piece of cake. I did use Zyban which was amazing.
Get yourself one of these things too:
http://www.mwilden.com/QuitTime/
If you need motivation it can help a lot. If you have any q's or whatever, give me a yell on ICQ 53618488
You can do this...don't let that shit control your life.