I enjoy Steam; even when not playing a game through steam, I like the ability to chat with those on my friends list.
Blizzard's Battle.net service is aspiring to do something similar, and with its new Real ID system, I don't need to own (or subscribe to) World of Warcraft to interact with those who do.
However, at the moment, the only other Battle.net game is Starcraft 2, which is fine and dandy when I'm actually playing it, but if I just want to talk to my friends, it's more of a hassle, as running Starcraft 2 and alt-tabbing back and forth between whatever it is I'm doing is tedious at best.
Is there a stand alone chat client I can use over Battle.net such that I can chat with my Battle.net friends when not in a battle.net enabled game?