AFAIK only DS Nitris can handle this format - Xpress Pro and the new MC do not but Avid is working hard on it (there was a post in the US Avid forum, where it was officially announced but they couldn´t say when they are ready for releasing).
Bummer...
I hope things start to speed up on this cause these variable framerates are my number one reason to get a HVX. But untill I can edit the footage my DVX will be burning some extra tape.
Oh well, maybe I could spend some on an M2 or something...