After years of hype, wireless users in the United States are waiting for all the technology pieces to come together to make <A HREF="http://news.zdnet.com/2100-1035_22-6110100.html?tag=nl.r23660">surfing the Internet from their handsets</A> as easy as it is on their PCs at home. So how close are we to simple and robust Web surfing from a cell phone? The answer depends on whom you ask. Some experts say the mobile Internet is already here. Some people say an entirely new domain name, called "dot-mobi," should be used for Web sites that are optimized for mobile surfing. Still others propose using intelligent browsers to turn traditional Web sites into something that can be viewed on a small handset.