These types of numbers are called vanity numbers. They're good for radio or TV, where we've used them before with good success. That way people remember the numbers. But in print ads, it doesn't matter as much.

You can search them at:
http://www.att.com/tflookup

You can buy them at the above, but there's better rates on the minutes with a company that does enhanced 800 numbers http://www.tollfreelive.com

Good luck being vain! Ha ha