- Joystiq's X360Fancast is kind of grandfathered into the Joystiq community -- it's existed for a very long time and is really just the guys that already played the 360 getting together to do it for fun. It did not even used to appear on the front page until Stiq 2.0. They do offer a regular Joystiq podcast as well, which is often times more informative. I don't see them as biased for having it. I also wouldn't count on them ever having a ps3 fancast, wii fancast, pc fancast, etc.
- Both consoles give you identical gameplay experiences. So who really cares?
- Plenty of online forums are overrun by ps3 fanboys, you might just need to look a little harder. I could see GB being tilted more toward the 360 in the community due to the achievement tracking system (a lot of people join because of it), but who knows.
In summary -- no one cares what platform you play on as long as you are having fun and can play with your friends.