Very nice - though some of the content integration mentioned would be a nice option.
The license plate wiki is interesting, but I fear the privacy implications. Sure, it may be legal, but it would still make me uneasy. I can see someone e.g. escaping their abusive spouse only to have their position given away online.
Or people outright lying for revenge. Or bad drivers blaming other people.
Wouldn't the wiki-community-spirit help prevent this kind of thing? Guess not, it'd be one person vs another.
This would only work if people were also incentivized to post good stuff about you; for example on Ebay, even if you have a dick downvoting you unjustly, the amount of good feedback will probably make it up. But here, there's none of that.
> *A wiki-powered site where vehicle registration plates are the subdomains, for example, HY10AGV.carwiki.whatever.
Make sure the subdomains explicitly include the country somewhere too—HY10AGV.us.carwiki.whatever.
At least for the US, you'd need a state separator as well, since otherwise you will have collisions. Or is that the point?
Are identical plates duplicated across states - if so, then yep, a state too! (us-ca, us-ny, etc would work)
This is a solid idea. An open version of Carfax/AutoCheck. And kind of like the way that Redfin keeps track of historical pricing information on real estate. Platewire is somewhat related (http://platewire.com/), but focuses on the driver instead of the vehicle.