I'm really interested to make a site like this, but anyone know where i can get the special Yahoo Messenger code for it?
http://www.xeeber.com/
What is Xeeber?
Xeeber is a professional online service which can help u to recognize the status of all Yahoo users, to see who is online, offline or invisible mode easily.
How does it work?
When you make a query, this website connects to a Java backend using PHP and Ajax technology! The backend uses YMSG protocol to connect to Yahoo! Messenger server and logs in multiple Yahoo! bots. Every time you make a query one of those bots sends a special packet to Yahoo! Server which has different responses for Offline and Invisible, and that way our program finds out the user's real status.