hack to find invisible Yahoo! Messenger friends

Want to surprise your Yahoo! Messenger friends who pretend to be offline using yahoo messenger's invisible feature?

Note: yahoo messenger has a stealth setting setting using which anyone online can appear to be offline using the invisible mode. it is not available in google talk though!:(

Now it is easily possible to beat that stealth mode using tools like Xeeber or VNGrabber. Just go to their site. Put your friends Yahoo id into the box and press "Check" or "Submit" button. It will clearly show whether your friend is really offline or pretending to be offline (i.e. invisible)!!

link1: VNGrabber
link2: Xeeber

Enjoy!