We now have a Steam group!
It's public so anyone can join, but still under construction. The group has a chat room, a discussion board and you can see what everyone else is playing and join their games!
Yes, you can join games. If two people own CS:GO (as an example) and they are friends, they can enter each others game, it's a LAN party without all the driving and moving of electronics.
You can find it by searching on the community page for 'FS Gamers the Gathering' on Steam. Or you can find it by adding me: Tara Maow. Just please let me know how you found my screen name so I don't block you.
For anyone who doesn't all ready have Steam, it's a free client for playing computer games and chatting. It can be found here: http://store.steampowered.com/