Multi Threaded Applications/Games

Ok - now that there are numerous dual core processors out on the market (AMD X2, Core2Duo, PentiumD) and the quad cores are being released; I started thinking what - if any applications or games exist - or are slated for release that will harness the full power of these processors.

I realize that I can surf for thinks I shouldn't be surfing for, Defrag a drive, and burn a DVD all at the same time - but what exists out there that can use the combined power of both processors - or all 4 processors for quad based systems?

So I ask the collective - what do you know of that is either in production, or been released that can use both cores. I don't care if it's word processing, database, games, benchmark, or multi-media.

Thank you for your assistance.

Cheers.

I've been programming personal, multi-threaded games and apps for 5 years now. :? Goes to show you how slow the big corporations are.

You've given me insentive to re-vist my two best examples I had kickin around. I've added some features for you that you might find interesting or better yet, useful.
Feel free to check 'em out (sorry in advance if I can't post external links).
http://computersystem.brinkster.net/