If you haven't heard of Hyperfocal Design, get on over to their website and check them out now! They're based in South Australia and they've been offering super high resolution texture sets (including HDRI versions) for years. They've also been generous enough to sponsor a few of their texture cd's in past Sumea challenges too.
As reported at pr-canada.net, Hyperfocal have gone nuts. They're practically giving away their professional quality sets with the new price.
HDRI Skies: Best Sellers retails for $157 USD
HDRI Skies: Volume 1 retails for $297 USD
Hypervalue Bundle: $397 USD
If you're a current gen development studio, that's practically peanuts. Anyway, if you're interested in finding out more, read the report over at pr-canada.net at the link at the end here, or just head on over to the Hyperfocal website!