Samsung GALAXY Tab 10.1 Wi-Fi Android 4.0 update now live in the States
Getting Android 4.0.4 in the States
The update brings the Android build on the device to 4.0.4 with the software version ringing up as IMM76D. Ice Cream Sandwich is arriving to the Samsung GALAXY Tab 10.1 Wi-Fi OTA, but if your unit hasn't received it yet, there is no need to pout. You can force the issue by doing a manual update using Samsung Kies.
source: Phandroid
Things that are NOT allowed: