Mich is currently checking out a VoIP solution using the world renowned Asterisk, an Open Source PBX.
Well he got Asterisk installed on a "server" (aka - spare parts sitting around the office thrown into an old Compaq Deskpro chassis), and in order to test this fab solution, we got ourselves a couple Cisco 7940 IP phones:
Now these babies are hot - real hot! I don't know if you've recognized them, but they're practically the same suckers they use on "24" - and guess what? We have the unofficial "24" ringtone! Yes sir!
We are such geeks...