I have a Toshiba 46HM84 and NO I am not a few hundred hour user, thank god; I've got thousand of hours out of mine, loved every minute of it, but the bulb finally popped last week.
www.alltvlamps.com @ $219 is one of the only places I've found so far.
Toshiba 23311083 LAMP aka TB25-LMP is the model number listed. Is it possible to get better bulbs that can marginally increase the picture quality (not that I have any complaints now that I'm using HDMI)?