This is funny

:-())

http://img3.orkut.com/images/small/<yourdateofbirth>/<yourdateofbirth.jpg>

give your date of birth as
for example
   if you are born on
29-JUL-1983
then
your url looks like

http://img3.orkut.com/images/small/29071983/29071983.jpg

example below:
http://img3.orkut.com/images/small/234234234234/234234.jpg
Any random number is possible.