DreamWorks wins an award for its innovative use of Linux (c|net)

We did a PS3 port, too.  At least part of the PS3 dev toolchain was available both on
GNU/Linux and Windows.  In fact, if I recall correctly, the compiler was just a port of the
GNU/Linux version (gcc, I think) that plugged into Visual Studio.  I don't know if the
performance analyzer was available on GNU/Linux; I only saw it being used on Windows. But the
state of the PS3 tools at that time (summer 2006) was pretty awful, so things have probably
changed in the meantime. In any case, just as they did with the in-house tools, the game
developers I worked with chose to use the Windows versions.

It might be different if your house is PS3-exclusive, but outside of Sony I don't imagine
that's a very common situation, especially given the state of console sales.  If you're
developing for DirectX and/or the Xbox in addition to the PS3, it's just hard to make a good
business case for developing on GNU/Linux, I'm afraid. :(