If Paris Hilton had you on speed dial, then your phone number has been exposed for all the world to see.
Paris Hilton's famous for a lot of things, one of which is her use of the T-Mobile Sidekick. The rocket scientists at T-Mobile decided to store customer data on a central server as opposed to on the device.
T-Mobile has had awful security issues of late and it's scary in a way that Paris Hilton's little black book has gotten more press than hackers reading the Secret Service's emails due to a similiar flaw on the same network.
So, if she had you on speed dial, your phone number and email address is no longer private information.