You :DCAN :Dfind out if a person is invisible. Its a smal trick and may not work always depending on the person (whom you are trying to find out) is smart enough or not.
1) Invite the person for a conference and wait. If the person is online, he/she has to either accept it or deny it. And whatever the person does (accept or deny), you get a conformation.
2) Send a file to the user whose status you want to find out! If you get an acceptance/ deny, you can find out!
The only way this doesnt work if the person does nothing. If the person is offline, you can simply get the message, “the person is offline”. Otherwise you just wait. If it takes too long, then the invisible friend has either dragged the window somewhere else and not click on anything. Or, he/she just might be offline.
It would be nice if they had an block/status checker like they do for MSN. Here’s the link to the MSN block/status checker if anyone want to see it http://www.mess.be/