We all know that most of the sites with "yahoo messenger password stealing programs" are mostly fakes with trojans or whatever viruses...I actualy found an program(from an very good friend of mine)that can steal yahoo IDs.
This is how it works in theory:You invite this victim at your place and invite him to enter yahoo messenger and login.Now instead of entering the standard yahoo messengeer icon,you will enter my program,which has the same yahoo icon,and its called:Yahoo messenger with voice.Now the victim will type his username and password and try to login... and dang!error:Error network connection,please try again.Ok now the cool part:the usernameand password he typed will save in an text called "Meteora" in: My computer > Disc local C
Have fun with this program...i think it is realy cool

This program was scanned with Avast antivirus and im very sure its virus clean,but if you are not sure,just scan it.