I just wanted to give you my compliments for creating and looking after Stack Overflow. I found it few days ago (how could I live without it?) and I find it very very useful. Well done. Thank you.
Of course, if you like what you see the best (*) way IMO to pay compliments to stackoverflow is to stick around, answer a few questions occasionally, etc. Welcome to the community. Leaving is not allowed ;-p (unless you annoy Jeff...).
(*=although I'm pretty sure the team also love seeing the occasional (and much-deserved) "thanks", "awesome", etc)