On an unlocked, stock, T-mobile Nexus One, here in south FL. Got tired of waiting so I side loaded from 2.1 to 2.2 about 3 or 4 days ago. It was ridiculously simple, and I went through each of these individual updates as I didn't find a single update file for going from ERE27 to FRF91:
signed-passion-FRF50-from-ERE27.1e519a24.zip
signed-passion-FRF72-from-FRF50.bc033f9e.zip
signed-passion-FRF83-from-FRF72.684bd56a.zip
signed-passion-FRF85B-from-FRF83.f62ffd2b.zip
signed-passion-FRF91-from-FRF85B.db99fdf1.zip
Didn't notice ock's post where he linked to the ERE27 to FRF91 direct update, but luckily I randomly downloaded each of these individual update files as they were released and had them lying around on my computer. Go figure, lol
As for the updates, it was time consuming, but 100% pain free. After each update, I experienced little or no lag upon rebooting my phone. However after updating to froyo, I saw that my phone was noticeably faster, and had all those snazzy new features
I had maybe a few, minor apps that I had to reinstall or that stopped working (for instance Swype and 1 or 2 settings widgets) but overall I didn't have any major software issues with froyo.
If google decides to release another update to froyo, I'll probably sideload that too, it was really easy and beats waiting. I'm proficient with computers and following simple instructions but I'm totally clueless when it comes to tweaking or hacking. So if anyone has any questions or needs those individual update files, feel free to PM me, it was easy, and you shouldn't be scared to side load
