What's the standard font called that comes on droid x running 2.3? What font ships with the droid x on 2.3? Is the same font used across all android devices running 2.3?
Prior to Android 4.0 (aka Ice Cream Sandwich) It's called "Droid", and comes in Serif (Regular, Bold, Italic, Bold Italic), Sans (Regular, Bold), and Sans Mono variants.

A new font family "Roboto" was released with 4.0.

Wikipedia article on Droid (font)

Google+ post on Roboto