Besides ARMA II CO, I'm waiting on a few more games for flash sales but that's about it. BAC and all the DLC plus TW2 Velvet edition is plenty with GW2 and PS2 almost here.
As for gifts I'd suggest people hold off for the Xmas sale because Prez's Play it Forward was a hoot last year and it'd be nice if we could expand on that not just for the Bluesers but getting other people into as well so it becomes a mainstream thing. Maybe find a way of just randomly finding a user on Steam to send them a cheap game on their wishlist with a note directing them to Play it Forward and see if they'll get in on it to help make it grow. That'd be cool if every Xmas you just randomly have a few games gifted to you - and if you have them, just pass them along and so on.