Possibly an object on the street, or even just in the loading screen (like it has for the old "upgraded" streets). It would be really cool to know who helped to build each street, and it would be *especially* awesome to know who founded each group hall, when those are implemented. It could be like the founding fathers & mothers of whatever group.
Annnnd, there are a couple streets in Besara that I was #1 for in beta, and I want to brag...;)