Limit the available countries list in the drop-down menu

I think there should be a global setting in the module's options that would let the admin limit the phone countries available in the drop-down menu when creating a cck field. I was thinking perhaps a list of checkboxes? This would enhance the usability of the menu greatly. Imagine that this list is not complete and it will get larger and larger as new countries are supported.

As an added bonus, the site's enabled languages could be auto-detected and then have the corresponding phone countries' checkboxes enabled as defaults in this list. I mean, it is only natural for sites to want to handle phone numbers of countries depending on the site's available languages (with the exception of the generic 'International Phone Numbers per E.123', which I think should be enabled anyways).

Thanx in advance for considering this one.