equipment recommendation - How to find a release date of an upcoming point-and-shoot camera?

I read some reviews about the Canon Powershot S100. It sounds like this camera is perfectly suited for my needs. But unfortunately it is not available yet. I can't find an actual release date, neither on online shops, nor on the manufacturer's homepage.

Is there any other source where I can find reliable release dates for cameras? I'm looking for release dates in Switzerland or at least Central Europe.