Karl: It sounds like an interesting but vast project. What form will the registry take? I assume you're familiar with Bivouac.com? I think they have a pretty good format for an informational database. Lummox does have a point about it being a lot of work for a lot of people, but I think there are plenty of obsessive-compulsives out there to get the ball rolling.
Its too bad the change issue had to be shelved, making it more of a historical archive than an active resource. I have a friend who's made a stack of FA's, some of which are quite scary, and in his older and wiser condition he'd like to see some of them made safer, so that good routes can see more traffic. As noted, there really is no forum that allows for the blessing of retrobolts by a first ascent party, but it may be that something national in scope is not the way to address it. You might want to take a peak at the current thread titled "Static Point Bolts" for a discussion around the issue at a regional crag up here.