I think this (Nov. 15, 2011 issue) may be the first time I've seen Wine Spectator publish a list of organic and biodynamic wineries from a region - that's a good start. The article states:
"Today, about 11 percent of the region's total acres under vine are certified organic, with many of the area's most lauded estates, among them producers who regularly earn outstanding ratings in Wine Spectator tastings, employing organic or biodynamic viticulture."
If you're into Alsatian wines, check out the following organic/biodynamic producers mentioned in the magazine. Thanks to Wine Spectator for labeling some things correctly - the transitional wineries are called out and the biodynamic one separate from the organic.
The magazine also contains a list of practicing organic or biodynamic wineries (not listed here) but it doesn't say which is which. Oh well.
Jean Ginglinger & Fils
Domaine Mittnacht Freres
In Transition to Organic Certification
In Transition to BD
Francois & Phiullippe Ehrhart