If you're on the Sprint network, and you're thinking about upgrading to the Galaxy Nexus, you might want to hold off for a bit. Some users in Sprint's forums are reporting that they are unable to connect to Sprint's 3G data network, instead only able to get data via WiFi. Ouch.
Said one user, who attached the above screenshot:
I've attached a screen shot from RF Signal Tracker.
It shows EVDO-A is available and a "Network State" of "CONNECTING"
Every now and then it will get a data connection and the network state changes to CONNECTED, but that will only last for a few seconds. It doesn't matter if I'm in an area with 2bars or 5 bars, same results. I've tried toggling all of the differnt options under Mobile Networks.