No, I haven't been able to figure out how to switch to ICS.
After adding the 3 G watchdog, thank you for figuring that out, it is limiting what my email can do when it is not on WIFI. Now, my usage is back to normal, but only because I chose background data restricted to WIFI. IF I take that off, it goes right back to sucking data at extremely large amounts in very short periods of time. Like I drive to the store and it sits in my purse, and uses 1/2-1 whole gig. That is half of the two I have for the entire month.
I am over 3 now, but staying close to that. I don't even want to think of what it would have been without the block the 3G watchdog put on it. I just don't think I should have to block my email when I am not home, kind of a bummer.