Lets have another trick....
Just post your friends this image as scrap and as they open their scrapbook it will show them their IP, Service Provider, operating system and and place where they are surfing from...(This tricks works at any webpage)
just scrap this 2 line together-
>img src="http://www.danasoft.com/sig/SJCoder.jpg">/Image< >img src="http://www.danasoft.com/citysign.jpg">/image< (Replace > with < and < with > in the above code )