At 90 GH/s, I'm getting roughly 0.02/day, so at 60, I'd expect around 0.013 or so at the current difficulty (which just changed around Friday or thereabouts). His estimate of 0.02 per day in that auction is based on the difficulty about 2-3 weeks ago. These last few difficulty increases have really stung.
The blown PSU isn't a big deal, in the sense that these units run very well with an ATX PSU, perhaps even more stable.
You can calculate expected earnings as follows:
Daily: hashrate*86400/2^32/Difficulty*Reward per block
At 60 Ghps, this is:
60e09/2^32/ 2193847870.1743*86400*25 = 0.0137543 coins per day
Great estimate, NecroBones!