I'm pretty new to this stuff as well, and I found a pretty nice compilation of posts of what seems to be very informative posts from VWVortex.
http://forums.vwvortex.com/zerothread?id=148337
http://forums.vwvortex.com/zerothread?id=249463
Here is where I got the list of posts:
http://www.houseofthud.com/variousposts.htm
Not sure how accurate the information is, but it seems legit.