I think it may be around October this year, but don't quote me on that. I'm pretty sure I read that it'd be starting about a month after the release of the Season 4 DVD.

I hope it's starting soon. I can hardly wait!

Ok this is pretty unspecific, but link, it's supposed to start in 'September of 2008', but no precise date is given.

NBC has finally announced the big day...September 25th!! *jumps up and down in excitement*