The aforementioned Vegas Watch, Baseball/Basketball Prospectus, Ken Pomeroy's stuff at ESPN and elsewhere, and other articles that are normally linked to from one of the others.
I'm friends with one of their writers so I'm obviously a little biased but they always have some funny stuff on there. If you're a midwest sports fan it's one of the best sports blogs out there because all the writers went to Indiana University and they're all huge Bears/Colts/Hoosiers/Illini/Pacers/Bulls fans.
Great poster (also a mod at one point) who stopped posting frequently and has since been doing a blog about this daily life betting for a living. It is a great read.
One of my favorites is Hurricane Mikey - this guy is a poker dealer in Vegas. He posts almost every day about life in Vegas - htp://hurricanemikey.blogspot.com/