Chinese Company - M2M server
This Chinese company which would prefer to remain nameless is using The Server Framework in a "Hydrology Project" to control 20,000 devices which connect over GPRS.
The devices connect every 10 minutes to send data to the server and get responses. The connections are all very short.
The company had originally written their system using an alternative networking layer but were having problems with it. They've switched to using The Server Framework and now everything is working well and they are up to testing with 8000 devices.