What cameras are micro sized?

[fling1]

I am interested in finding a very small form-factor camera. I've seen the dinky keychain cameras, like this one:

http://www.overstock.com/cgi-bin/d2....prod_id=870558

But I want at least a chance of taking a decent picture.

I've looked at the Sonys, and I think something like the discontinued DSC-U20 would suit my needs. (I see they are available on ebay, anyway). 2MP is enough res without hogging space, and it looks like the flash and options are reasonably comprehensive. I'd like zoom, butI suspect that's asking too much of these micro units.

But I don't know what else is out there. It seems there are a million cameras, especially when you start thinking about discontinued stuff, and I don't know of anyone who sorts them by size.

So what else should be on my list? Any specific thoughts on the Sony DSC-U20?

Thanks for your wise counsel !