I've been following this thread for some time - I had a Thunderbolt (in all its unlocked bootloader and ROMs galore goodness!), but then I lost it...and picked up a used Bionic. Overall, I like the Bionic soooooo much better! Except for the bootloader, anyway
So, my question is this: why is an leaked JB build out of the question (assuming VZW screws us all over)? I threw 4ext recovery on my Bolt on day 1, overclocked the (single core) processor to 1.7GHz, and never used an official build (including jumping up to the ICS leak when it came out, because HTC/VZW took forever). When I got my Bionic, I put Eclipse ICS on it on day 1 and haven't looked back because it's been rock solid.
My point is that I'm pretty familiar with ROMs...but I'm not a dev, nor am I especially clear on the role the bootloader plays. If there's a stable, working JB build that is ONLY being held up by the jerkfaces at VZW, why wouldn't a leak to the dev community yield us a JB ROM in short order? Is it because we're changing the base from ICS to JB and that requires a bootloader update?