Droid. Does anybody have one?

[OakLeaf]

I can find out all about the apps, etc., but not a word on how well I can hear my daughter's voice. (Sigh.)

It's Verizon. 'Nuff said. (And if you mean audio output quality rather than the network, music is much higher resolution than voice - anything that's a half decent music player won't be an issue in voice conversations.)

I couldn't help but wonder if I could use it on a bike tour.

That's been addressed here w/r/t the iPhone several times, and the short answer is no - unless maybe you plan to carry at least one and possibly two spare batteries, plus the capacity to charge all your batteries at overnight stops. By all reports the Droid's battery life is about the same as the iPhone's (which is only a few hours when it's being used for navigation). The Droid's big advantage in that department is that its replaceable battery lets you carry a fully charged spare or two.

Bottom line is for navigation without a way to charge your device on the road, it's Garmin or nothing.