(Official release version, not beta.)
Here's the link to a foum that will (hopefully) help you install it, etc.
http://www.blackberryforums.com/gene...scussion-curve
Two things...
1) You may have to register a forum account to see the appropriate section(s)
2) You abolutely HAVE to match the OS to the exact version of your phone.
(Hint: not all Curves are equal, you have to know if you have the 8300, 8310, 8320, 8330 etc.)
My upgrade process is about 98% finished. We'll see how it goes.