This won't work for some standard stuff that OS X ships with, for instance Python (when started as a command-line interpreter). That's because .inputrc is read by the GNU readline utilities, and Apple links with the BSD equivalent.
To make this work for Python:
Add a file called .editrc with the following content:
bind -v
Add a file called .pythonrc with the following lines:
import rlcompleter
import readline
Add a line to your .bashrc which makes Python run .pythonrc when it starts interactively:
