This is a nice tool but I don't get the obsession with github. Surely resumes should be about what you worked on and how it went rather than where you host it? People use other public repositories a lot, like Google Code. In addition many really good programmers may not be able or willing to work on open source code. I do like the Stack Overflow careers profile though, which allows you to add links to open source work on a few services. Though I get the irony that that site is heavily biased towards people that are active on Stack Overflow.