"After 3.5 yrs., adios iPhone--now a happy Nexus S owner"5.0 starson by ghileman
Pros: The tech is well documented, so I'll add two things: Android is a state of mind (freedom). Feels good. Also, if you're like me and spend time going abroad then an unlocked phone like the Nexus S is ideal. No more cat and mouse with Apple.
Cons: Do I miss the iPhone? So far, not much. The Android bloomberg app has a few less customization features (e.g., inability to reorder your news selections). Curved screen looks cool but but is a marketing gimmick. NFC chip is useless right now.
Summary: Google just released their first update for the Nexus S, which suggests they're going to be actively supporting it. That's a big reason I went with this Android phone versus waiting for one of the dual-core Android phones coming out next year. This is the official Google phone and Nexus S owners will be first in line to receive all updates, including Honeycomb due in Q2.
Also, dual core offers big battery gains but it's unclear how much of a performance gain you're going to get. The Nexus S is quick, so I don't feel like I need more speed. Also, I doubt Google would release a phone that would bog down with Honeycomb coming so soon.
Battery life looks solid so far. With the screen cranked all the way up I'm still making it through the day.
Overall, I'm stoked. Stoked to have a phone as solid as the Nexus S which integrates all my google accounts. And stoked to be free from the locked down, controlling clutches of Apple.