Anyone who wants to learn more about OD&D ought to visit the Original D&D Discussion at http://odd74.proboards.com/

Michael Mornard, who was a regular player in Gary Gygax and Dave Arneson's OD&D campaigns is a regular contributor. He posts under the handle "gronanofsimmerya."

Jon Peterson who wrote THE book on the history of D&D also posts there using the handle "increment." Also check out the blog he setup for his book, Playing At The World, at http://playingattheworld.blogspot.com/