I quit in October 2010 and stupidly started again in February 2011 :o.
This is my third serious quit. I used patches on the previous two, but this one is off the back of reading Allen Carr's Easyway book. I didn't really expect anything from the book, but it's prompted something within me.
Not doing too bad (just into day 4 as at 10:45). No major quit-threats so far...
Good luck to everyone who's in the process of quitting. It's the greatest gift you can give yourself and your nearest and dearest.