I Have a Canon S90 for sale which you might like. It's hardly been used, just a couple of times I think so condition is like new. It fulfils all the criteria you set, plus gives great image quality. The lens is one of the fastest in the compact market at f/2,(twice as much light gets in as an f/2.8).
There's a review
here
It'll be going on Ebay at the weekend but if anyone fancies it before, it's £275 (and I'll even throw in the P & P !