Didn’t know there was an identical topic up on the Finance Board…my bad. 
To put in my 2 cents, I think the scales balance out on the slightly-to-fairly positive side.
Obviously it’s great that Apple’s newest product is selling like crazy. The press was just all over the news. Of course, this does bring up that specter of Apple historically suffering from insufficient supply to meet demand, product delays, and so on. Still, I agree that it’s better to somewhat adequately address the needs of one market (U.S.) rather than starving two (US + world). As Steve Jobs put it in that Q4 2003 results conference call, it’s a pretty safe bet to go after the “lowest hanging fruit” first, since demand is just so huge over here.
I guess at the end of the day, having the rest of the world wait for another three months or so for minis (hopefully they’ll ship before July, but noting Apple’s timeliness of shipping as of late, that’s probably wishful thinking) won’t be too bad…so long as one or two notable intervening events don’t occur in the meantime. Given Hitachi apparently has a near-100% strangehold on the 1-inch HD market right now, if Apple has no hard drives for iPod minis, and iPod minis are the market share leader in their particular segment (here’s hoping they are), then the other guys can’t have all that many 1-inch hard drives to work with themselves, assuming Apple’s been buying them all. Thus the negative market impact of having frustrated buyers going after the “next best thing” should be somewhat blunted by Hitachi’s limiting factor (though I imagine some degree of harm will be done in the worldwide market).
To me, the most foreseeable/troublesome intervening problem that could put a significant hurt on iPod mini’s quest for world market domination could be from players like Cornice, or perhaps other firms with tech we’ve yet to see. If Cornice can bump its “storage elements” to 2, 3, even 4GB before July, and with wide availability, there may be a chance for “close enough” products employing Cornice tech to gain a substantial first mover’s advantage. I guess we’ll just have to see.
EDIT: Interesting thought, Bryan…and here I was thinking Apple was just doing its traditional “premium price for superior product” thing, with a dash of cutting-edge technology price adjustment (given that the price differential of competitors is actually kinda small). Because when you stack it up against 256+ MB flash players, the iPod mini is still an absolutely kick#$$ value. If only they had a time machine, huh? 
Can’t wait for the iPod/mini sales figures for this quarter.