ArcGis v9.3 layer file
Google Earth .kmz
Right-click, save as...
Shapefile includes all areas mapped to date: 1,328,196 acres with 502,421 acres of wetlands in 26,299 polygons
(winZipped, 27.6 MB, 25 Aug 2011, with layer and boundary file plus metadata and browse graphic)
GoogleEarth file does not include 2011 mapping...