More about bicycles & electric bikes

Today's email brought a link to an article about bicycling, electric bikes, and converting our society to one that is less reliant on fossil fuels. It's a quick read, and a good summary. Check it out here. I'm particularly pleased that he points out that Europe and China are already making this transition, and how the electric bicycle can help. My son loves his ebikes - he now has 2, one a folding one that is easy to transport but is not as powerful, and his "Big Blue", which zooms up our incredibly steep hill, only requiring a little bit of pedaling at the top. He has so much fun with them, and they're so incredibly frugal, that I was wanting to join in. Alas, between my knee surgery, and my herniated disk in my spine, it looks like I'll have to wait until later. Anyone out there over the age of 30 who is getting around by electric bike? How's that working for you?