I've been giving this some thought. I'm a software engineer and an FJ40 owner. I could build a web site where people could register their vehicles and put as little or as much information as they like, including pictures. They could specify what information they want public and we could have a verification process as well.
People could use the site to find a vehicle history for a particular vin they submit, or people could visit the site to browse vehicles--all 78 FJ40s that were 416 color. We could have a 4 sale section, stolen section, etc.
It would be a bit of work, and wouldn't be done overnight, but if it would be useful it could be a way I could contribute back to the community.
While a custom site could provide a lot of features, we might be able to get by with modifying the Ih8mud vbGarage. The forum software has a garage add on. We might be able to just add a VIN field and be done. Or there might be some add-ons, hacks, available or custom development that could be done to make the garage itself a little more useful. In that case, it might just take some research and make a proposal to Woody or whomever.