I've just found out, to my great and pleased surprise, that HD DVD is region-free. What made them make such a sane decision? Thank god for the small favors. :)
One reason I'm happy for this is that Blade Runner on HD DVD is £18 from Amazon UK. And the US "Ultimate Collection" on HD DVD is $28. That's about £14, so that's five disks for less than what I was about to pay for one disk. (OK, then there's shipping, but still.) (Oddly enough the "Ultimate" collection is available in the UK, but only in regular DVD version.)
... Oops, I see now that what I'm getting is the "Complete Collector's Edition". The "Ultimate" one comes in a small suitcase and contains stuff like a letter from Ridley Scott and a small paper unicorn. Frankly I don't know that I'm that much of a geek and a fan, even though it's one of the best movies ever.