I've put together the first cut of a wrapper that tries to smooth over some of the non-essential differences in implementation details across platforms, while still respecting essential platform conventions. It also works around a few bugs I discovered along the way.

It includes the wrapper class itself, a minimal demo, a more realistic demo, and the notes about current behaviour of the underlying Tk widget on different platforms.

Current snapshot is at https://github.com/roseman/tkdocs/blob/fontchooser/fontchooser.py

Obviously, this borrows hugely from previous snapshots by Lance and Elisha. Thanks!

If you get a chance to try it out, would appreciate feedback if this is on the right track or not.