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Duluth Superior Linux UNIX Users Group
http://www.dsluug.org/
LUG for the Duluth Superior region.
Madison LUG
http://www.madisonlinux.org/
Madison, WI area LINUX Users Group.
NorthEast Wisconsin Linux Users Group
http://www.newlug.org/
Linux user group in NorthEast wisconsin. Site contains a mailing list and meetings information.