Automatic Address Book

I've been spending the past hour or so manually updating my address book and i find it very tedious. then i thought, perhaps facebook has an application that could do it for me?

over half my friends have a facebook acount, most with some for of contact on their profile. Is there some kind of software that can retrieve and combine all the contact information so i have a complete address book?

or perhaps a bit more complicated : i have all my friends numbers on my phone, and all my friends emails on my hotmail account, is there a software that could merge the two but in a smart way so that it wouldn't create duplicates?