That's is the idea behind Masterbranch (
https://masterbranch.com). Masterbranch creates profiles based not only in information from GitHub but also other forges like BitBucket, GoogleCode, Sourceforge and almost any independent reachable repository out there (we support Hg, Git, SVN, and CVS).
Because not everyone has FOSS info we also have hooks to have information about private code without sharing the actual code so you don't have to worry about broken the IP, NDA, etc. And other stuff like StackOverflow reputation, etc. You can even give "free beers" to other developers as a thanks/kudos/good work
We are currently working on a new profile, less resume, more dashboard, you can take a look to it here https://masterbranch.com/drbrain/cool-new-stuff
So, the main idea is an identity (not just a resume) for the developers merging all their identities in one place and give them a tool (not only to find a new job) to stay connected to their peers, know what's hot on technology, discover interesting projects, etc.