I really like this idea FWIW. That said, there's some big barriers to making it a reality. I think it'd be difficult to get enough external services to integra

I really like this idea FWIW. That said, there's some big barriers to making it a reality. I think it'd be difficult to get enough external services to integrate into the personal service for grabbing Github/Yelp/etc. data. There'd have to be a standard of some sort that people were willing to build with. External services that want your data will ask you to oauth directly to Github et. all, or go around you to figure out who you are instead and then scraping pages. You'd need enough people demanding to keep their data private to make it worth apps' time to do that.