If you search "utopia" in say Yahoo, you get thousands of "hits". I don't have the patience to try more than a few, but I found a few. You might find them worth checking out.
Wayne's World, created by Wayne Hartman has good energy and good intent.Wayne and I correspond. I learn a lot.
New civilization Flemming Funch's contribution has many ideas, but little focus. That's the trouble with changing the world. No one agrees on how to go about it or where we end up.Asked Flemming if he wanted to make his site cooperative. He didn't.
New Earth Network David Sunfellow runs this one. Had my web page for a while. Asked David if he wanted to turn his site cooperative. He didn't. He wants lots of money to do good. I wish him luck. The site contains, among other things, commercials for new age materials and art.
Millenium Matters covers a lot of territory. Has many links to many related sites. Worth a look.
New Age Network conceived by Joshua Shapiro links to other New Age sites gratis. Worthwhile. In my opinion networking alone is not enough.We must eventually decide something and act. Good start.