IF they go to a 1.66ghz Core Duo, 512mb RAM, GMA950, 80gb 5400rpm HD, SD, AE, and BT model for $599 I'll get one immediately. That's a great price and would make an affordable upgrade from my current mini (assuming I could get at least, say, $350 for it which is fairly reasonable I think).
I'd probably be OK if they went with a 60gb HDD, but the SD is non-negotiable. I think the current high end mini is a perfectly acceptable machine for 90% of the people in the world, even those who want to play SOME games (the GMA950 outpaces the 9200 in the PPC minis in most things, especially in Windows).
Ideally, though, I agree that the mini needs to get back to a $499 and $599 (or $699 if the specs warrent it) price point. If they update the speed and keep the price the same this update, they need to have a mid cycle price drop to $499 and $699, followed by a move to Memrom and the x3000/Santa Rosa platform (at the same prices).
EDIT: Now that I think about it, even if they don't make those specs at that price, the refurbs are already $699, so there's a good chance they will drop to $599 after a refresh, which works just as well for me... guess I'm getting a new computer next month! (WooWoo for 3 pay period months

)