Codes for Life: 4QR

I'm working on this side project that I'd love to get some feedback on. I caution you, it's slightly nerdy, and will most likely only interest marketing/advertising/research people and geeks. The site is 4QR.me and it's essentially the marriage of Quick Response codes (those 2D checker-board things you see on the FedEx label) and Short URLs (like TinyURL, Bit.ly, etc) except with a reusable component making the effort more long-term, and with built-in analytics, to make it more attractive to marketers. I made a nice picture to help explain it.

I'd love to get your feedback about how this early concept works, so if you'd like an invite to this private beta, just go here and get one.  If you want a bit more info, check out the blog I set up to explain it.  Cheers.