Nice find, and maybe a nice niche producer. I do wish I could find out more specifics about this system, however. I checked out your link, plus I visited http:www.pavegen.co.uk and was unable to find out more than the following:

• A Pavegen unit can put out 2.1W per hour under certain conditions. I cannot find out what those conditions (i.e. number of footsteps on it) are.
  
  
• A Pavegen unit can recharge completely in 5 hours at a busy shopping center. Again, I have no idea what their exact definition of 'busy' is and there is no mention of the charge capacity of a unit.

What I would like to know is the following:

• What typical traffic usage is anticipated to be the baseline for specifications?
  
  
• What is the coverage size of a unit? (It appears to be approximately 4 ft².)
  
  
• What voltage output is produced?
  
  
• What is the charge capacity at this voltage?
  
  
• What is the power output per average footstep?
  
  
• How much does a Pavegen unit cost?
  
  
• What are the installation requirements for a Pavegen unit?

Until I get these questions answered, I am wary. It could either be a ripoff attempt (impractical to accomplish anything other than get money for the company), or it could be a decent niche production for low-power apps as I mentioned earlier. Either way, I'm afraid I don't see this doing very much to make a dent in traditionally-produced power usage. It's more of a novelty.

TheRedneck