How about starting an old game I had earlier seen somewhere on orkut.
The game goes like this: One person will post the link to his blog post. The next person has to post a comment on that blog and then post a link to his blog here. It continues like that like an unending chain. However a few rules to keep in mind: You should comment on the same post only once and secondly please read the post before you comment and not just comment for the sake of it.. :)