You can add Quake Live to that list.
Played Heroes for a little bit, particularly when it first came out, but gave up pretty quickly because of the lack of Aussie servers. It's better now and the only reason I see for going back to it is to get the Veteran unlocks on BC2.
The new battlefield is a Micro transaction game and is currently a closed beta arrangement. Put my name down for a Beta key with the first couple of hours so we'll see what happens.
Combat Arms, developed by Nexon could be added as well.