What's your distinguishing point over Slim and Silex (rip) because from your example script I don't see anything different. I mean, how would it, (un?)fortunately PHP syntax doesn't let you play as much with DSLs as Ruby or other languages.
But seriously, this has been a tool for me to relearn PHP, and those contributing so far have also been learning PHP. If it ends up just bein (and nothing more than) something helps me, as well as others learn more about PHP, it's a success.