There's quite the lively discussion on firehouse.com with this thread name. It's pretty one sided, as you could imagine. Perhaps some of you could log on there, and give arguments for seperate services. I'm sure that you'll get a lot of mileage out of that thread, and also bring balance to the discussion. It'll definitely hold more entertainment value for you than discussing stethoscopes, POV lights, so on and so forth. It shouldn't be much of a hostile environment, so don't be afraid to jump in. I haven't seen any derogatory comments towards single role EMS workers or anything.
http://www.firehouse.com/forums/showthread.php?t=113757
http://www.firehouse.com/forums/showthread.php?t=113757