http://www.bored.com/dialpeople/index.php you have GOT to try this!!! try it on yourself first just to see that its for real and how funny it is. ive been getting my friends ALL day long. even got my girlfriends mom!
oh man its hilarious. you can call any number you want and have it say its from any number you want and you leave a message and a robot voice says it when that person picks up. for instance: i had it call my one friend and had his caller id say that it was from another dude and when he answered a robot was calling him a smelly homo