Comments:"Google has indexed thousands of publicly accessible printers - port3000"
URL:http://port3000.co.uk/google-has-indexed-thousands-of-publicly-acce
A quick, well crafted Google search returns "About 86,800 results" for publically accessible HP printers.
There's something interesting about being able to print to a random location around the world, with no idea of the consequence.
Lock down your printer :)
PS: There are security concerns here, as many printer models have known exploits which can be used as an entry point to a private network.