http://www.flickr.com/photos/misschatter/ / CC BY 2.0The Nationals made a long-anticipated move today, optioning pitching phenom Stephen Strasburg to Double-A Harrisburg, where the righty will begin the 2010 season. Strasburg will be joined in central Pennsylvania by similarly-promising pitching prospect Drew Storen. Strasburg, who just had his most vigorous outing in a Nationals uniform on Friday — 73 pitches, 53 for strikes in 4 innings — packed up his locker in Viera this morning. It’s a nearly-universal…