I clearly joined DNF too late to indulge in the .mobi row
But anyway, not a .mobi investor myself (have just two of my own brands), but I was lead to believe that Nokia etc were intending on launching mobile browsers on future phones with ".mobi" built in by default. So you'd only need to type in "ING" in this instance to hit their .mobi site.
Maybe I got the wrong end of the stick, but I guess this is possibly why the big boys are spending time and money developing? Kinda like the Internet Keywords/Google Toolbar Keyword concept that worked so, erm, successfully