Last night he did an amazing monlogue about the defining moments of his alcoholism and why he finally checked into a rehab center, he also made it very clear that alcoholism is not something that a rehab program can clear you of, its something that he works at every day. He said he doesn't have a drinking problem, he has a thinking problem. That (I think) is one of the best definitions of alcoholism or any mental illness I've ever heard.
He was discussing this in relation to Britney Spears and the current issues she has had lately. He mentioned several times that to him, at least, it seems as though she is a young woman seriously in need of help. He also said, that although she would be an easy target for snarky humour, he refuses to attack her because of this. What an amazing way to get a dialogue of some kind opened...
Anyway, here is the link to his posted monlogues, seriously, check out the February 19th one...it is excellent.
http://www.cbs.com/latenight/latelate/comedy/
btw - you need RealPlayer plug in to view it...CBS...sorry. It might be posted on youtube.com too, I dont know...