Welcome to MobileRead, Tommy!
The short answers to your questions are that Sony hasn't really said anything about shipping outside the U.S. except that they're not doing it presently, and that the Sony PC side software will only run in WinXP at present, but I don't think the iLiad cares what it's connected to.
You can poke around the respective forums and find a wealth of detail on those topics, and many others, but that's the nutshell version.
