I did the deed... ordered the Droid X today! I'm excited! What's really cool and a bit mind-boggling is the way it and similar phones like Salty's Evo are so many devices in one. You combine a high speed processor, an internet connection, cool sensors, and an open source operating system, and wonderful things result. It's a phone, a web browser, a PDA (appt calendar, etc), a camera, a video camera, a flashlight (using the camera flash LEDs), an MP3 player, a GPS, a calculator, a USB storage device, a bar code scanner, a movie player, a game player, a streaming audio player (Pandora), a speedometer for running/biking (via GPS), a remote control for a computer, a metal detector (of the stud finder variety, I think; probably not of the beach-combing variety), a guide to visible star constellations, etc.
Salty: thanks for your input. In the end, although the 4G and front-facing camera were tempting, I decided the $10 extra per month I'd have to pay for the Evo wasn't worth it. If the prices had been the same, I may have gone that way.