I've been asking my mum the same thing recently. She's been checking around for it, and apparently got some news that Borders will be stocking it some time soon. If there is a shop near you, go on in and see if it's confirmed.
I'm not sure if it's correct, hope it's not, but I read on another message board it won't be released on DVD for another year here in Australia, mainly because it's still playing at Imax in Sydney and Melbourne, likely until September. Guess it shouldn't take too long to be released after it's finished its theatrical run.
Damon, do you have a multi-region or a Philips or Magnavox DVD player? If you do places like Amazon.com have the Region 1 release DVD you can order and play on those out here.
It's still playing in Australia at this point in the year? Back in September it was playing 6 shows a day in Melbourne, and the last time I saw it on January 2nd this year, it was down to 2. I didn't think it'd last this long at IMAX.
According to the Imax website it's still showing in Melbourne, Alex - there's a session today. It's also listed as still showing in Sydney, but no times for today. I can always take a stroll over there at lunch and see if it's still on...I'm more focused on the Coral Reef Adventure movie at the moment - wouldn't mind catching it.