For just $199, CenturyNameMuseum.com—"Your Last Place on the Internet!"—will keep your full name on the Internet in perpetuity. Why you would want your name on the Internet in perpetuity isn't explained, but anything that costs that much must be worthwhile.
For $399 you can buy your "Half Name"—first, middle, or last—and attach any information you like to it (up to 500KB), and a link to your website. Thinking genealogically, you could buy up the surnames of your ancestors and link to your one-name genealogy studies. Less genealogically, you could buy up the names of famous people and hold them for ransom.
So far, proprietor Rinchen Puntsok of Tibet ("Yu Wei" if you're Chinese) hasn't sold a name yet, but uses the names of a couple of friends as examples. He is looking for investors, but realizes that not everyone will understand his vision.
I am now seeking somebody who assents to my view in the world. Of course, I know it may be very difficult, so I have prepared to deal with anything myself for long-term running. But currently, what I can do is only talking up like this -‘pay attention to your name; find out who will buy it from us’.” [Link]Update: After reading the comments Rinchen Puntsok has made in response to this post, you'll understand why I have changed its title. I can't help but respect someone so good-natured and persistent as Rinchen, and encourage everyone reading this to follow his good advice: pay attention to your name.