I grew up in a home committed to cloth diapers for reasons completely un-environmentally aware. My parents were simply frugal. :) And I applaud them for it.
However, folks like my parents won't see any appeal in these diapers, which aren't as cheap as simple cloth ones. But for those who use cloth diapers in an attempt to lessen their contribution to the landfills, this may be a very welcome product.
Here's a story about gDiapers on HappyNews.com: http://www.happynews.com/news/1122009/flushable-diaper-offers-parents-new-option.htm
These things are apparently as healthy and natural and breathable as the traditional cloth diapers, but easier to manage. They look to me like a hybrid between a cloth diaper and a disposable. I've never seen them in action, so I can't offer a recommendation. But I thought I'd just spread the word. Especially since the website has lots of pictures of cute babies. :)