T-shirts and food trucks: Has Twitter found relevance?

As the old saying goes, if you build a better mousetrap, the world will beat a path to your door. But what if your tool isn't quite so functional? What if your mousetrap doesn't really have a purpose, your company doesn't have a business plan, and your audience doesn't really know what to do with you?

Well, if you're Twitter, that might not make a difference.

In a recent issue of Time magazine, Ashton Kutcher writes that the social networking medium is "as significant and paradigm-shifting as the invention of Morse code, the telephone, radio, television, or the personal computer."

While that might be a little excessive, there is no doubt that the handy little site has done wonders for Kutcher, who has gone from being "that Punk'd guy who married Bruce Willis' ex" to "that Punk'd guy who talks to his wife in front of a million people on Twitter." One can only assume that this is a step up.