I've heard the Houston AMSAT Net sends slow scan television pictures as part of its regular proceeding. Is this unique to them or are there other examples out there?
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Appleton WI http://www.apleinc.com/WB9KMW/SSTV_2M.html
Columbus OH http://www.qsl.net/n/n8tut//sstv/
Sacramento CA http://www.n6na.org/nets/sstv-net
And, a 2005 list, some of which are sure to be active still http://www.hffax.de/html/net.htm