Barron’s Online launched today and is delivering its content for free for one week. Barron’s, a division of Dow Jones & Company, is moving its publishing model from just having the Saturday edition to include a daily on the Web.

The Barron’s article on Expedia caught my eye. “Expedia Online Model No Longer Clicks” points out that Expedia’s future is getting a bit cloudy.

The article confirmed what I have been thinking for a few months. Travel search sites like Kayak, which I use all of the time, and Mobissimo are easier and less expensive to use than Expedia and Travelocity. As Mobissimo says on their site, “Mobissimo is the ultimate travel search engine with a simple mission: improve the way people seek and discover travel information.”

The Internet is in a state of constant movement. Expedia killed many travel agent businesses. Kayak might just kill Expedia. I’m not so sure that any business model is completely safe any more.