Playing with URL shortening

URLs cannot only be shortened. They also can be expanded.
Since  a lot of  pople are using URL shortening services,
it was funny to reverse some randomly generated URLs.
Basically, you find peoples browser history including
session ID's etc. Not a big deal, but I think it could
be used to build some surf statistics and other nice
info gathering.
The script can be found here
Please be carefull not to hammer the servers; thats
actually why a sleep() was intriduced!