Download

Developers can download the final 3.0 firmware

I just saw on my developer account iPhone than the
iPhone firmware 3.0 as well as SDK update are available for
members of the iPhone Developer Program. . sdkiphonefirmware3.0

We also note that we have access to the description of
new APIs.

Apple has made available a guide to find out if your
app is compatible with the firmware 3.0.

checlist

Thanks to Thibault for warning me 😉