from The Genesis Project:
"There is a ton of announcements from Adobe today as we kick off both Photoshop World and IBC. The two bigs ones for me are the announcement of P2/MXF support in Premiere Pro [there's no transcoding or rewrapping] and Audition 3 [Windows-only, but picks up UI parts of Soundbooth]."
Good news for Premiere users. Oddly, Adobe lists the P2 news in the upgrade section of Premiere CS3.
Update: You can buy Premiere or an upgrade from Adobe, which posted a press release somewhere I could find except for Jonas.