Thanks! Be sure to drop us a line if you want to dig a bit deeper into integration.

For social networks, we're proxying the APIs (essentially). For articles and news, we both aggregate organically discovered articles from streams, as well as scrape 250k+ RSS feeds and other news sources. So, articles are stored local to the server (which is why we have such a large collection of them), but sensitive social information is a pass-thru to the social network.

However, in both cases, we're doing lots of analysis on top of the data per our "normalization" philosophy.