There's another OTA package for the HTC Rezound out in the wilds of the Internet, and quite frankly nobody knows what's going on with it. We (and likely everyone else) have reached out to Verizon, who hasn't yet responded with news of anything new, so we have to roll with Internet wisdom on this one. Scary, I know.
We do know that the update has a new radio, new recovery, new kernel, and updates in the firmware itself. What we don't know is what the update brings new to the table, or what it might have fixed. Some users are less-than-happy with the ICS update from earlier in the month, so there very well could be some bug and stability fixes. There's also the global roaming capability that Verizon has promised for this summer, so maybe it's there along with the new radios -- there is a setting in the options for Preferred Network to be Global now.
We won't know for sure until Verizon posts the changes, or enough people get the update to verify the suspicions. That's where you come in -- if you've received the OTA (or flashed it manually via directions at XDA), sing out in the Rezound forums. Help get this one figured out!