Thanks for thinking I'm the best scripter here. But I must say I'm not though. There are people here much better than me
Unfortunatly I don't have the time to attempt to write a sniffer.
Making a sniffer is possible though. It was done once a long time ago (by some very good coder) but it was buggy. After that several people have tried the same thing but no proper working code has ever been posted.
I don't use Messenger Discovery myself, so I can't check
Messenger Discovery is made in a entirely different way than Messenger Plus!. MD sits in between Messenger and the protocol and many of its functions are based upon sniffing and changing the protocol messages. So, if it claims it can notify you when someone starts typing, it is most likely true. But if it claims it can notify you when someone has just opened a conversation window, then that is a false/inaccurate claim though.