I'm really not sure what kind of data I can use for all the statistics (not sure what kind of data they collect from everyone, except your status and achievements). But I'm hoping to make it somewhat more personal, so you could share it with your friends and stuff.
But I sure can use some help on what kind of data is interesting.
One thing I'd personally like is an analytics type of view for my stats. i.e. graphs of different stats over time to show improvement. I don't know how much social stuff there is to be done, because steam already has a decent community view. I'd definitely like to talk in depth about it if you're looking to discuss things. My contact info is in my profile if you're interested.
But I sure can use some help on what kind of data is interesting.