Okay, everyone (I think) knows Whatpulse. If so, don't read further! If you don't know Whatpulse, please read further :-).
Well ok.. Whatpulse is a small little program who counts your clicks (from your mouse) and the keys (from your keyboard). When you want, you can upload (it called pulse in the program) these stats to their webservers which will add the stats to your profile. With your profile, you're listed on whatpulse.org and you can see how many users are behind you, and what is the next user above you (just like a competition). There's also an option to install whatpulse on different computers like a laptop, a server, a workstation etc. You can profiles to your account on the website where it's installed (like: work, home, laptop etc).
There are two different 'competitions'; one for users, and one for teams. A team is a couple of users who tries to get higher in the list. As you already know, the list is generated based on the pulse-profiles, so the more users a team has, the more they'll rise up the list.
If you want to try whatpulse (why not? :P), go to their website @ http://www.whatpulse.org and register yourself!