I would agree with Mostly_Harmless. I've looked around other forums for info about the Subaru Impreza I bought my fiancee. Yes, there are tons of peopel posting on there; however, the knowledge level of their posters(or so it appears to me) is not that of those on this board.
I am by no means an expert or anywhere near that. Hell, even changing my oil myself still freaks me out. The fact that I now know how and also know enough to diagnose problems myself shows how much I have learned from this site.
Sorry for the long post. In summary, no, this may not be the most active forum, but in my opinion, it's definitely the most knowledgeable I've seen. Hope to see you around these parts again!
On a side note: Thanks to everyone on this site who take their time to post relevant info that newbies like myself can understand.