All my phone numbers are prefixed with a '+'-sign and the international country code (f.e. '+49' for Germany). I use it because I sometimes need my PowerBook in foreign countrys. It would be nice to have a kind of location manager, which knows about my current location and, in case of beeing in the same country as the phone number to be dialed, dials without the prefix.
The same should be done with city codes and so on.
Without this changes, this piece of software is nice but useless for me.

A bug:

The default replacement setting for '+' is '00'. That's nice for me. But when clearing it to empty - like the default for '(0)' - the entry 'Dial in Speakers' will be grayed out and cannot be used any more.