If you still had any doubts at this point that the HTC Rezound Ice Cream Sandwich update was indeed rolling out as reported by the first batch of users, let me dispel them right now. Verizon Wireless just updated the official document detailing the Android 4.0.3 rollout (it's indeed HTC build version 3.14.605.12 and Sense 3.6). Here are some screenshots of the doc along with the changelog:
With this upgrade, your device will now run on Android 4.0.3 (Ice Cream Sandwich). Additionally, here are some feature enhancements included with this software release.
Applications & Widgets + V CAST Media Manager has been updated to Backup Assistant Plus with an enhanced user experience.