I've played a bit of Rogue Survivor. That game has potential. It's still in Alpha though. I'm waiting for it to at least get to Beta before I really start to play it. There are too many other games out there that are finished.
I'll defiantly be keeping my eye on RS. When it gets more fleshed out it should be a suitable zombie game to play until Dead State is released.
I've played r09 as well. It's not really that good, imo….it's a nice coffee break style of game, but not really my thing. I'd rather play a few rounds of Delve Deeper than that one.
Desktop Dungeons was interesting for the first hour, but I became bored after that. It's a great freeware game, but again if I want to play a coffee break game I'll play Delve Deeper.