Import address book/contacts from various Mail Services

Hey guys,

First of all, i am really n00b if you talk about ruby and rails, but i guess it is so comfort learning this language that i find myself doing some hell lotsa complicated stuff in just fraction of seconds, for eg streamlined,scaffold plugins

Well, i want you guys to help me importing the contact from address books of yahoo,gmail, hotmail etc.

How is it possible to do the same ?
I understand that there is a google API for the same, but that one is to import stuff from GMAIL all alone, but what about hotmail and other email services.

Please help me guys, its kinda urgent

thanks for your time.
cheers !!
Realin !