As a promise from my previous post. Since Octazen is bought by Facebook, I have no choice but to build my own contact importer.
Well I'm finished with my wrapper and now will offer this to public for free.
You may access my webservice via this url : http://webservice.ezdec.com/WSESContacts.asmx to get your yahoo / gmail / hotmail-live / aol
For provider list here is the info you need.
1. yahoo - Yahoo
2. gmail - Gmail
3. aol - AOL
4. hotmail - Hotmail/Live
Note: Just leave the key parameter empty.