..But maybe I'm mistaken in thinking it actually allows me to control some amount of how the information I send to them gets used. Facebook has bothered me enough with their, "hey, guys! You can now turn off your own privacy protections in this shiny new way! It's so awesome, we will do it for you by default! All you have to do, if you don't like this, is reactivate your privacy protections after we've turned them off for you. It's that easy!" ..I could never trust them with the sorts of things I would only trust to closer friends.

Regular Nethack, with some announcements of unusual/awesome things you do on it, could be pretty awesome, as Nethack is already so. I suspect Multiplayer Nethack, whether it's on Google+ or not, will require either legendary patience by people waiting for their turn to move, a high speed of computation/button mashing while you move your character before the fact that other characters are moving allows the monsters to jump up to you and kill you, or some kind of time limit, turn-based system...Which falls back into the patience category, but maybe a little less hard. It's super fun in concept, but I don't think it would work out too well in practice. If someone proves me wrong, though, I'll be eager to check it out, and then eat my words.