Phonebooth, a hosted telephone system http://www.phonebooth.com http://www.phonebooth.com Great fit. OTP process restart characteristics. Per-tenant process se

Phonebooth, a hosted telephone system http://www.phonebooth.com http://www.phonebooth.com Great fit. OTP process restart characteristics. Per-tenant process separation. Process abstraction, in general, rather than threads. Finite state machine behaviors. Live code upgrades. Mnesia database. Only real downside was it took the rest of the team a bit of time to become effective in Erlang... about 4 to 6 months.