> We expected the HW to fail often and such, but in 2 years ... nothing has ever failed and the server has never gone offline (except when it reboots every Sunday @ 3AM in a min or two).

I began my career by scripting Asterisk using Python. I created a daemon using Twisted and that process ran for 3 years without fail (as in, the same Linux OS process was running for 3 years). This was on commodity hardware.