All heroics have been done 5-boxing now - they've tweaked the way vehicles work so those encounters are no longer a roadblock. Several (many?) folks are having various degrees of success running teams in guild or PUG raids. My guild is at a underwhelming 4/14 Ulduar-10 bosses down - been able to run at least two, sometimes four in there with decent success. I dont care for 25-person raids, so my experience is mostly in the 10s.

Haven't touched PVP since S3... so I'm a bit out of touch on that front