Paul Thurrott was also talking about this in his blog at www.winsupersite.com... I believe that Joe B.'s Media Center team is actually the same team that developed the Zune Marketplace.
From Paul's blog:
"The only thing I can add to this is that I do know the Media Center guys essentially took a year off to work on, yes, the UI for Zune 2.0. This explains a few things, I think, including why the "Fiji" update to Media Center was delayed." Posted Apr 16 2008, 01:37 PM by pthurrott with 10 comment(s)
Niveus Rainier 500HD Media Center PC
4 tuners (2 CC, 2 OTA)
64" Pioneer Elite (PRO-720HD)
Marantz, Parasound, Mirage, Definitive Audio Equipment
Logitech 890 Pro Remote
Linksys DMA-2100 Extender
HP MediaSmart WHS
3 Xbox 360s
Zune
Sonos