I'm not familiar with "Blogging" but I can vouch for Yahoo groups which are free. I see people use them for family reunions, Treadle On get togethers, and pretty much anything. I store Davis serial numbers, old newspaper articles, and pretty much anything Davis sewing machine related in a Yahoo group: http://groups.yahoo.com/group/DavisSewingMachine/
Very simple setup.
There seem to me many manufactures which very little is known about and all one turns up in a google search is a paragraph and a few pictures. Not exactly a hotbed of research going on with sewing machines but a fascinating one.