It arrived today and I've switched. From my Nokia E71 of 18 months to this.
1GHz Snapdragon processor. WSVGA AMOLED display. 512MB memory + 4GB SD card. Android 2.1.
First impression from Anna when I went home. "Wow iPhone!" (arrghhh!)
So far so good. Installed a few apps to get the VoIP working. I do miss the nice QWERTY keyboard on E71 though. Typing on Nexus One on the first day is awkward (and super slow comparing to E71). Fingers are too clumsy I guess. Can't wait to get onto Swype beta and hopefully that will help out with my slow typing.