Something that I thought was pretty cool is talked about in this article.  It is called a MiFi or a 3G Router.  It is a great idea but it is still not worth the cost.  I am of the opinion that they need to bring the price down even more before this takes well with consumers.  You can read the article from the New York Times here:

State of the Art – With a Private MiFi Hot Spot, Be Online Wherever You Like – NYTimes.com