Curt's Cafe Jazz
It's the blog for this radio station
You can download a ton of great jazz tracks and albums at a very reasonable cost (Prestige, OJC, Concord, MaxJazz are all available!)
Jazz Improv Magazine
The website of the best magazine for the serious jazz fan. You can also download free copies of their sister publication, the "New York Jazz Guide".
You can buy CD's by indie artists that you can't find anywhere else, such as many of the indie artist you hear in the Cafe. Great customer service too.
Web Bible Network
A great place to study the greatest book ever written. With all the major translations and great study helps as well.