I try to follow a couple of teams throughout the year on Scout.com and thru their local newspaper blogger.
Phil Steele's weekly news and notes is great for breaking down things you don't see in a box score and saves a bunch of time. Sometimes you can find hidden value in a line.
ESPN has bloggers by conference, and you can keep updated with the headlines for each team. I go w/ the Pac10 blog. Good stuff.
VegasInsider.com for line movements to see where the money is going.
And this site to get all of the "expert" opinions