I’ve installed the update from FRF83 (500K) on my own Nexus One, and installation was smooth, as always.
It is unknown what the update brings and whether it will be the last one before we see the final official Eclair>Froyo update.
You can download the update here if you didn't get the OTA yet:
- T-Mobile Nexus One: FRF83 > FRF85B (500KB)
- AT&T Nexus One: EPE54B > FRF85B (46.5MB) - this will update your stock unrooted Eclair 2.1 AT&T Nexus One to Froyo! (Oops, Artem mistakenly labeled this as FRF50 > FRF85B at first)
You can also follow the thread on the subject over at the XDA developers forum.
Installation instructions can be found here.
Thanks to @clickwir for sending us this link via Twitter