Yeah, when joining other servers it tends to download a a lot of files and my game was still running smoothly, though when I tried to use other windows like Firefox it kind of lagged a lot, lol. Maybe joining a game you made wouldn't be so bad after all, but then again downloading all those mods would take a few minutes, wouldn't it? ;p
Yeah, the only bind things I've done was thirdperson and that kill thing you asked me to bind, very useful when I want to change models.