Apparently, Valve was never really against making PS3 games as we thought they were. Joystiq.com recently interviewed Valve's Doug Lombardi (full interview not up yet), and he was questioned on whether or not PS3 will ever get Left 4 Dead.

Valve is still "up on the idea" of Left 4 Dead coming to the PS3, they are just waiting until they have some good PS3 coders/developers before porting the game over. Valve also made a distinct hint towards Left 4 Dead 3:

quote

When asked whether Valve is actively seeking to hire PS3 developers, he noted that "Valve is always looking to hire people. So yeah, definitely." Are you a dedicated PS3 coder who wants to make Left 4 Dead 3 for the system? You know what to do. We look forward to seeing your handiwork in late 2010.

Source: Joystiq.com

It's not exactly a game that would make you split a decision between buying a 360 or a PS3 though, is it? Yeah, it's a great game and having it I suppose 'on the side' of the 360 could encourage a few people to purchase a 360 over a PS3, but it wouldn't exactly have shocking results in my opinion.

Besides, those PS3 owners must be getting bored of their shitty little games, let's let them have this one.