Yes, but there are tons of other data sources out there, right? For example, how many developers are members of mailing lists for a given API, service, languag

Yes, but there are tons of other data sources out there, right? For example, how many developers are members of mailing lists for a given API, service, language, tool, etc.? How many contribute? Plus, that doesn't even include the world of personal blogs, twitter accounts, etc. I think we're entering an age for software engineers where expressing yourself externally is going to be even more important than your resume. For example, a really intelligent, well-thought-out post like the one linked above can really move you forward in your career. I'm focusing on making a startup that captures all this stuff and uses it for both display and matching candidates. I'm still in the very early stages and would love some feedback! http://proovn.com http://proovn.com