Wow, I'm actually able to contribute something of substance rather than just a question (speaking of which, thank you to Lisa for her quick response on my last inquiry).
iheartmy67stang: Yes, you can put individual ringtones for different callers, though not for individual numbers (at least not that I've found). So far, in working with clients and their phones, I've found that you can have up to five unique ringtones for five different contacts, but that you cannot deliniate between different phone numbers for the same contact. That is to say, if you have a contact named John Smith, but you have three different contact numbers for him, every one of those numbers will register with the same personalized ringtone. So you'll know it's John; you just won't know where he's calling from.
At least, that's what I understand from reading multiple articles and from working witha few of these phones for clients. If I'm wrong, please don't hesitate to mock me incessantly.