A Microsoft device is non-standard? That's shocking.
I've seen projections that as many as half of the Windows computers sold into homes in the next year will be Windows XP Media Center Edition. (I'm surprised how many of the computers at Costco are Windows MCE already.)
Maybe it's worth looking into the requirements for MC to integrate with Windows MCE - not UPNP but the support that streams the program to a Media Center Extender. That's the other way to reach an XBox 360.
I have
no idea whatsoever what that involves. But I see it in Adobe Photoshop Elements 4, which claims to allow access to photos thru Windows MCE to a Media Center Extender. I can imagine MC on that list on the XBox, listed under "More Programs," ready to present its theater view onscreen in the living room.
The last time this came up, you mentioned NetRemote, which certainly works with the right mix of hardware but is nothing like the kind of mass market that might develop for Windows MCE and XBox.
For what it's worth. It's kind of a moot point for the next few months, until XBoxes are on the shelves. . .