Well given initial questioning.. I don't think it's possible to have more than one ringtone right now. Seems there is only a general and silent profile. And I haven't heard anyone else speak up about the ringtone issue (it's not in editting a contact either).

So yes it seems right now it is not the perfect phone, it only has one ringtone for each type of alert. Unless Nokia hasn't implemented yet, or it's hidden deep somewhere.. it should at least be a ringtone per group (family, friends, work, etc..)