Russ's site is really good! (Hey Russ! I've lost your link! What's your web address?)
The Penturners Group at YAHOO (http://groups.yahoo.com/group/penturners) is just chock full of good information on penturning, you just have to dig it out! Start with the files area. If you're looking for an answer to a specific question, a search of their archives will usually result in an answer. And the funny thing is, the best place to search their archives is right here at Penturners.org. Click "Home" on the menu above, and it is one of the links on the left hand side of the page. (http://www.penturners.org/yg/penturners.asp)
Good Luck!
Scott.