The internet regulation system approve the creation of new web extensions beside .com , .org , .us and others thus every person or company can register a practically infinite number of web pages.
The Internet Corporation for Assigned Names and Numbers (Icann) announced that it will be possible in april-may 2009. I believe at first there are going to be expensive to register, but in time the price will fall. This is one of the biggest changes since the introduction of .com.
Imagine you can put your name as an extension, or everything you want. We will have a lot of stuff to choose from. It will be a big change, we will have to wait and see!