I received my Nexus One today and have been starting to learn how to use it. I have it working via WiFi, but haven't plugged my SIM into it yet. Android, the operating system in the N1 works with IPv6 and I can connect to IPv6 sites with it, when using my home WiFi. However, I'm curious if IPv6 is available on any of the cell networks (I'm on Rogers). The way to test this is to try to go to ipv6.google.com. If you can get to that site, you have IPv6 available. I have heard that Telus is working making IPv6 available, but haven't heard anything from the others.