Valve's Doug Lombardi recently gave a quick comment to CVG about why Left 4 Dead is only slated for the PC and Xbox 360 platforms.

We're not PS3 developers - we're doing PC and 360 like with Orange Box. EA came to us and said 'Wow, Orange box was an incredible project, can we do a PS3 version?'

If you mention a new Half-Life, people want to make as many versions of it as possible. If Left 4 Dead is big, then we may see a PS3 version later, or if and when we do a sequel, people may be more interested in that.

We're only 150 people, so there's only so many things we can do. But it's one of those things with partners, wanting to take on that investment and risk. I think until L4D is proven, you'll probably just see what we make in that franchise.

There you have it PS3 owners. If you want your own version of Left 4 Dead to call your own, you might want to start begging EA or another development studio to offer their services to Valve!