If your site proposal results in a site that goes live, you get a special badge, like "Site Conceiver" or something to that effect. You would be the only one on that site with that badge.
-1. These sites are supposed to be about the community, not individuals, and badges are supposed to encourage good behavior. The proposer's name is already highlighted on Area 51, and proposers can already earn A51 badges for various proposal-related things. I don't see a purpose for