Welcome, Warbler!
It is an addiction, beware - the slope is slippery and steep.
With that said, if you haven't come across the following resources,
they are, like this excellent newsgroup, each very good sources of
regularly-updated information that I like to read regularly:
The Pu'er LiveJournal:
http://community.livejournal.com/puerh_tea/
The Cha Dao Blog:
http://chadao.blogspot.com/
The Tea-Disc Yahoo Group:
http://groups.yahoo.com/group/tea-disc/messages
The vendor sites are often very informative, my favourite of which a
Jing:
http://www.jingteashop.com/
Hou De:
http://www.houdeasianart.com/
TeaSpring:
http://www.teaspring.com/
Yunnan Sourcing:
http://stores.ebay.com/Yunnan-Sourcing-LLC
Two other great sites for general information a
Pu'er.net
http://www.pu-erh.net/
Babelcarp:
http://www.panix.com/~perin/babelcarp2.cgi
I should add that I have no affiliation to any of the above, short of
being a regular reader/poster on some of the fora.
I'm sure that there are many other recommendations from others that you
will find useful! Have fun.
Toodlepip,
Hobbes