There are some knowledgeable AK guys on our sister site, www.rifleforum.net. I am not one of them.
Also try www.akforum.net. They have subforums for practically every AK subvariant I've ever heard of.
Lastly, if you want to learn to run an AK, stroll over to www.warriortalk.com. Some of the guys who post there are a bit on the mall ninja side, but Paul Gomez, especially, has posted some great stuff about really running an AK.