From the Macromedia EULA:
License Restrictions
1. You may not use the Software on any non-PC product or any embedded or device versions of the above operating systems, including, but not limited to, (A) mobile devices, set top boxes (STB), handhelds, phones, web pads, tablets and Tablet PCs that are not running Windows XP Tablet PC Edition, game consoles, TVs, DVD players, media centers (including Windows XP Media Center Edition and its successors), electronic billboards or other digital signage, internet appliances or other internet-connected devices, PDAs, medical devices, ATMs, telematic devices, gaming machines, home automation systems, kiosks, remote control devices, or any other consumer electronics device, (B) operator-based mobile, cable, satellite, or television systems, (C) other closed system devices, or (D) any operating system that is not an Authorized Operating System.
Interestingly this means that people with the new media center PC can't grab flash (well not officially any ways)?