New! AmeiN! ArcMap© easy into the Net (web)! After the huge success of AveiN! we now also released an interface between ArcMap© and the UMN Mapserver. AmeiN! is integrated as extension into the GUI of ArcMap©. It writes UMN Mapserver project files and also convert many of the symbols edited in ArcGIS. AmeiN! is released under the GNU LGPL. You may download it for free, you can get a written manual from us (99 Euros).
Many voices chime in to answer the question “How does one find existing services that implement OGC Web Map Service (WMS), Web Feature Service (WFS), and Web Coverage Service (WCS) interface standards these days?”