Services such as Google's AdSense, which places textadvertisements on blogs and generates a few cents per mouse click, might bring in some spare change.
Google's ability to place small, targeted textadvertisements next to internet-search results, and on other websites, meant that many of the business models thought to have been killed by the dotcom bust now rose from the grave.
It offers subscribers 217 free text messages and 43 free minutes of voice calls per month as long as they agree to receive six advertisements by text message every day.