I just posted a topic in the 2.0 suggestion forum, and although 4 people were browsing the forum my thread got over 400 views in 3 minutes.
I am sure that is done via RSS, so that's not it. I think it is just from spiders and bots.
There are bots crawling twitter contiunually
If something with a link to your forum is tweeted, you get like 50 views instantly