When you live in Silicon Valley, there is one thing that you forget after a while: users here are on the cutting edge of innovation. Massive check-ins on Foursquare, Twitter updates, Yelp stickers on every restaurant door, geek

y events that attract thousands of people . . . it's a long list of signs showing how people here have jumped into innovation. As a result, living in Silicon Valley is at the same time enlightening and blinding.

Start-ups are proposing new services and products meant for improving other start-ups' products. (See: the vast Twitter 3rd-party ecosystem.)

Because Internet evangelization doesn't seemed to be the priority of start-ups – it's not their job, true – the Silicon Valley ecosystem appears to be a huge innovation marketplace massively dedicated to hyping geeky users.

Yesterday's Forrester study about location-based services shows that only 4 percent of online American adults have ever used a location-based app on their phone, and less than 1 percent are using them more than once per week. Within this 1 percent of users, 80 percent are male and 70 percent are aged 19-35.

More people are active on microblogging sites than using location-based apps: one-fifth of U.S. Internet users are now on Twitter. They are mostly between 18 and 44 years old, are already using social networks (Facebook, MySpace). As for all social media, a very small number of users is creating the content for the vast majority of the others (10% of users are tweeting for the 90% others).

If there is one thing that marketers and entrepreneurs should never forget, it's to always weigh the very large majority of Internet users that are staying at a simple level of utilization. Facebook is the first social media tool to be used so massively and it doesn't mean that everybody is ready to plunge into the web tornado.

By Mathilde Berchon