This is a good question.
Orangebloods was good for intel on the program, but its gotten to be just as good here, if not better because there is no filter. I think of the drawbacks to the OB board is the size. Its so large there needs to be an established team of paid moderators to keep things moving, and its not there. There is also an overabundance of people being jerks and keyboard soldiers.
Longhorn Digest isn't bad at all, and Im a big fan of Kevin Flaherty. He's approachable, does a good job, and doesnt go off like a half cocked $#@!.
Shaggy Bevo I havent seen much of, but they seem to be the "ghetto" of Longhorn boards. I havent found someone yet who had anything nice to say about them.