In-game, you can click a name or something on the Player list, and access their Player Data.
This makes it possible to see the player's amount of blood, his forum posts, total kills, current kills, current deaths, total deaths, how long he's been playing, in-game time, times he's been playing, and so on.
AND
When you kill someone in-game, it earns you blood that can be seen on the forums.
You can - like in many other games - go up in level. Meaning you have a little icon in front of your in-game name.
For startout, your icon might be a.. i dunno... something small and cute, like a mouse (No, not a rabbit. Save it for the last level

When you advance in level, you come across a cross, a vampire tooth, and all sorts of things.
Your level can also be seen on the forums.
On the forums, you will be able to see if they are playing right now.
So, how do you like this idea?