Z0mb1e, please note that I am in no way trying to steal your thunder with this as your idea to move the list to googledocs was a very good one and in all likelihood this idea will fall flat on it's face.
I've created a slight variation on the Steam Names List which should allow people to not only add their name but also say which games they have. Their names will then be categorised into different lists based on these games. For example, all those who on L4D will appear on one list, those with L4D2 on another and so on.
At the moment there are only four games on the list but I'll add on whichever games are available online via steam. Just let me know which ones are appropriate.
There's an instructions page on the document as well, hopefully this will make it easier for people to use the document.
Anyways,
here's the link for the document and I'll let you guys, particularly FrenchTart and Z0mb1e be the judge of it's usefulness.