Web fonty help!

I'm just poking about embedding fonts, but my references are all a little old. Anyone got a lead on what process to use so that it will be read in IE and Firefox (anything else would be gravy)?

Never done this before, so as idiot-proof as you can get is much appreciated. FWIW, the font I think I want to use is a .ttf.

EDIT -- Actually, if you've got a link to a site that displays fonts already recognized, that would probably be the best way to go. I'm using stylesheets, and so far the boss hated Trebuchet and Monaco.

Shit.

Scott Crossfield found dead in wreckage of plane.

RIP.