Not exactly sure what to make of this, but SCARY!
from Kevin Rose's site (from the Screensavers on G4TechTv.com)

I just ran across a pretty scary new Google hack today. It seems they have just recently added number span searching to their engine. Take a look at this example:

visa 4356000000000000..4356999999999999

As you can see, Google has searched the entire range against its DB. Within minutes I found some crazy sites like this one. Now please know that Google didn't create this tool to be used like this. It's actually quite handy when used correctly. Just an FYI for all of you.