Are you visiting more often? Maybe we just aren't talking as much as we used to...lol.
I have actually noticed that recently there seems to be less new topics than there were a few months ago. Not really that people are participating less, but there will be a new topic with 5 pages of replies...as opposed to 5 separate topics with 1 page of replies. Not sure the reasoning behind it...maybe we haven't had as many new members with new questions recently?