links for 2009-06-05 Doc Searls Weblog: Cluetrain @10 Another anniversary. Coincidence? (tags: geekery) Dan and Bob's Videos About the VisiCalc Announcement in 1979 Happy 30th! (tags: geekery data) Historic Issues of The Yearbook of Agriculture Have Been Digitized and Are Now Online via ResourceShelf. A marvelous but mostly forgotten resource (tags: agriculture yearbook)