I've been a USCCA member for 2 years. They have a lot of good info on their website, they put out an excellent 10 issue/year magazine, that I've really just started reading because I have far too many gun rags to read, and I've gotten more out of the 4 issues I've read cover to cover than I have out of any issues of G&A, Guns, American Handgunner, Shooting Times and Gun Digest combined.
Also their Defense Shield coverage alone will be worth the price if you ever have to use it. I also recommend
http://www.armedcitizensnetwork.org/home for additional coverage. They also send you 3 informational CDs at the beginning of each year that you're a member that are full of good info. They put a monthly newsletter too, that's also worth the read.
Blackwolff, did you get the ebook downloads from USCCA? Have you visited their website at all? I agree that they send a ridiculous amount of email, which is easily dealt with and can be unsubscribed from (though, if you're still getting email about joining, you might want to contact them and have them fix it), but they also have a good web store for training material and they run good sales periodically.