Ah, you could rent or borrow the BD from a friend to convert... ;)
The trouble with the burnable media is it costs the same as buying the movie. But we're talking here about movies that aren't commercially available on the format yet, so it still might be worthwhile to someone...
I'm staying out of the HD thing though, I can't afford to really bother with it and the library of titles is too small for me to care (much less the titles I'm interested in).
Give it another 3-5 years when all the bugs are worked out and the prices go down, then who knows...