Install it manually: http://www.androidcentral.com/how-manually-update-your-gsm-n...

Have you tried it? I have a GSM Nexus S but not on T-Mobile. Does that actually make a difference?

Tried it on my T-Mobile Nexus S and it worked perfectly. Can't speak to other carriers but doubt that it matters.. try at your own risk though.

Just installed and fully functional for those who care. (Nexus S on Wind Mobile)

Thanks, I have a T-Mobile device and it is working great. Posting from it now :)

If you're rooted using MIUI, CM, or any other custom mod you won't be able to do the update - it verifies the ROM you're on - wants stock GB.

Use this ROM instead. *Still uploading at time of post. http://forum.xda-developers.com/showthread.php?t=1396038

I'm in no hurry, as I just got a Nexus S. Wouldn't it run Ice Cream Sandwich worse than it runs Gingerbread?

I used an unoptimized ROM a few weeks back for the Nexus S 4G. Scrolling performance is much better in the launcher and browser than Gingerbread. The high memory use though slowed application loading (I'm guessing the apps kept getting kicked out of RAM) enough that I switched back to Gingerbread. Supposedly, the real ICS image for Nexus S is optimized for the device's mere 384 MB of ram.

So wait, I get software Back and Home buttons right next to my hardware Back and Home buttons? WTF, Google?

nope, you will not have those buttons duplicated (just upgraded my Nexus S to ICS)

Cool, thanks for confirming that. I guess Techcrunch photoshopped that screenshot together.

I just upgraded my unlocked T-mobile Nexus S. No issues so far.

Anyone know if there is a good custom ROM for the Nexus S 4g?