With time our Baldur's Gate II forum has amassed a huge amount of information, and practically everything in the game has already been discussed there. Of course, finding what you need there is the tricky part. You can always post a new thread, but for things most players have trouble with, the search feature of our boards is much more handy.

The search engine here works pretty much the same as all giant web-crawlers, the sole difference being that it will only display info that has been posted on our boards. So entering a location, name of a NPC, item and so on will usually yield a good amount of results.
A short list of keywords you might want try: Shadow Thieves, Bodhi, Vampires, Mind Flayers, Equalizer, Carsomyr, Lilarcor, Crom Faeyr, Firkraag, Dragons, Kangaxx, Lich, Stronghold, Kensai etc.