mpooler, you might want to look at the link above thanks to amazingly... and next time post this in the Pearl section, unless you just changed to a Curve and did not update your profile.
There is NO official 4.5 release from AT&T yet. And no one really
knows when it will be released
Probably never, they can't even get the Bold out the door. Doesn't matter anyway, just grab the latest, non beta, version and install that instead. As long as you do it right, its works as well as an ATT version would have.