It already has.
The 9th season is over and RoosterTeeth is most likely going to make a 10th, but they haven't released a date.
It will begin June 14th 2011. Sponsors of rooster teeth get it 2 hours earlier and members get it 30mins before non.
Red vs. Blue Revelations
Season 6
Burnie Burns, the director of red vs blue has said before that he will continue to make red vs. blue even if there are only a few fans left. So yes, there will be a red vs. blue season 11
The best Red vs. Blue season is season 5. It is the most funny of'em all (besides reconstruction, or whatever it's called).
There is Relocated,Recreation and then Season 9
No, season 10 will not be the last season to Red vs. Blue. Season 11 will most likely becoming out this year (2013), and Halo 4 will probably be used to make the episodes.
Yes
Season 3.
Red vs. Blue Season 9 - 2011 was released on: USA: 15 November 2011 (internet)
Recreation