That page is updated regularly. You can also check out more in-depth case studies of MongoDB deployments here: http://www.10gen.com/customers

And there's s growing list of stories at 10gen.com/presentations

Some good ones to point out: Analytica: http://www.10gen.com/presentations/mongosv-2012/exploring-pu...

Apollo Group (The University of Phoenix) http://www.10gen.com/presentations/mongosv-2012/how-we-evalu...

AOL : http://www.10gen.com/presentations/managing-large-scale-data...

Github: http://www.10gen.com/presentations/mongosv-2012/mongodb-anal...

Banjo: http://www.10gen.com/presentations/real-time-location-based-...

Telefonica: http://www.10gen.com/presentations/mongodb-uk-2012/MongoDB-o...

MapMyFitness: http://www.10gen.com/presentations/mongodb-seattle-2012-mong...

Sailthru: http://www.10gen.com/presentations/mongodb-seattle-2012-sail...

Stripe: http://www.10gen.com/presentations/high-availability-mongodb...

eBay: http://www.10gen.com/presentations/mongodb-ebay

These are all large deployments. It's a mix of small startups, startups that grew up and large engineering companies (like eBay and Apollo group).