I know this little rimfire has been out for a while, but this is the first one I have personally been able to handle one.
The Smith & Wesson M&P 22 Pistol is being made in Germany by Walther and imported by S&W. It is the same size and weight (24oz.) as it's 9mm big brother. It is outfitted with a manual 1911-ish safety that is optional on the full size M&P. It operates on a standard blow-back action and lacks the changeable grips (palm swells) of the standard M&P line.
Overall, it seems like a pretty decent .22LR version of the full size M&P. Guns & Coffee bought one a while back; then proceeded to have a coupleissues.