Motorola Xoom gets Android 3.1 update that activates microSD card support outside the US

You know that microSD card slot that's been laying dormant in your Motorola Xoom? Provided you don't reside in the US, that'll be getting activated soon as part of the tablet's Android 3.1 update, which is starting to roll out now and should have all of Europe covered within the next few weeks. Motorola explicitly identifies this as a firmware update for "non-US" Xooms, so Canadians would be well advised to check their software update utility, though the big question is why didn't the American 3.1 update include microSD support as well? What tangled web of intrigue lies behind this selective activation?

[Thanks, Alan]