Have a hankering for some Ice Cream Sandwich on the HTC Rezound? Patience, folks, as Verizon's not pushing it just yet, but an early and very much unofficial build has been leaked to the folks at Android Police, who have in turn made it available to everyone.
You'll need to be on a stock bootloader -- HTC's unlocked bootloader won't work -- and you need to remember that this is likely to differ from what eventually gets pushed out. (When the official version will hit is still anyone's guess -- Verizon hasn't yet said.) So long as you're cool with that, hit the link below and get to flashing.
Source: Android Police