I wrote about Test Driving Windows Vista Business, but don't bother if you are 'currently located outside of the available area'. What the hell? I hate it when that happens, but at least they should tell me this before I install the ActiveX control and get all excited about it.
I predict that in the future people outside the US won't be able to do anything. It is the same on some other pages like Google Books, where outside the US you can't the entire content on a lot of the books, or that the product is worthless because of the lack of content (Google Maps).