From: John Bischke on Quora
An aggregator goes around the internet gathering a certain kind of information. Then it dumps it in one site.Here are some sites that aggregate professional data:
Gild (http://www.gild.com) - Brad Warga says it better than I can in his answer
SocialCV (http://thesocialcv.com/) - UK-based company that looks promising.
Remarkable Hire (http://www.remarkablehire.com) - New company but also looks promising.