Demonstrating that the big telecom companies have not learned much over the past decade, they have successfully gotten a new top level domain called 'mobi,' as in cingular.mobi. In theory, this is supposed to make it easier for people to find content customized for cellphones, but this is a non-problem. It is straightforward now to design Web sites for cellphones, and you don't need a new domain to do it--there is no value add here.
All this is is a clumsy attempt to create more walled gardens for content, and of course, in a walled garden, there is a gatekeeper collecting fees. From a user perspective, it makes things worse, as you now have to make an extra decision....do you go to cingular.com to find what you are looking for, or do you have to search on cingular.mobi? Since it is very expensive to duplicate the content of Web sites, most companies using the mobi domain won't keep everything on their 'normal' site and the mobi site, so you may have to check in both places. Which takes time--make that *wastes* time and will irritate everyone.
The telecoms are still pursuing a 1950s era business model of "owning the customer," and they continue to try to do so in the Knowledge Economy, where you can't "own" the customer anymore. Every scheme to try to create special content for cellphones has failed...remember WAP? Neither does anyone else, because it was a complete failure.