Thanks for your interest in Groove 2007. At this time we don't have plans for a Mac specific version, but we are working with our Mac Office team to determine how to move forward with Groove on the Mac platform. The switch to Intel chips, of course, makes the future a little harder to navigate.
Groove does function fine under Virtual PC so that's an option for today's hardware.
28 March 2006
Talk on Groove on MacOS
I asked Marc Olson (who works at Microsoft to integrate Groove into the Office toolsuite) wether Groove-2007 would be available in a MacOS version - that was his answer (within a day):