I downloaded the demo of Mafia II from xbox live, and while very, very short, it looks promising. It's definately worth a download, while waiting for the release on the 24th.

The demo puts you and a buddy in multiple shootouts, with you having to drive a wounded comrade to the hospital, only to be cutoff by the cops. The demo ends here.

The world looks pretty great (depending on your setup, of course) and the animations/deaths/gunfights felt very solid. The cover system seemed to work well, and reminds you of the newly classic, "duck behind something, then have the ability to walk around behind it, peek out, fire from cover, etc.)

I lit up a car with an MG from a windowsill, and the explosion was very satisfying. This looks like a buy, for sure.

http://freeplaystationnetwork.yolasite.com