If you want to make international phone number entry work better, I've spent quite a bit of time thinking about that recently.

I've created a draft proposal you're more than welcome to follow up on at https://github.com/mtrimpe/jInternationalPhone

Interesting... looks promising. Using this would be tough while we share phone/email/urls fields though.

Bikeshedding on #2, set up a blacklist of very obvious non-business domains. Very few people with @gmail.com or @hotmail.com actually own the business on that domain.