I just confirmed a bug today with my motorola droid, android version 2.0.1.? Placed a call today, and turned on speakerphone.? Call recipient could not hear me talking.? Turned speakerphone off, and it worked fine.? A complete power-off of the Droid (press and hold power button, and choose Power Off) and then turning it back on fixed the problem.

Hope this helps someone else without going crazy trying different things -- and let's hope an update comes down the line soon that fixes this issue with the software!