Read the entire post, if you have a few minutes. It gives a blow-by-blow account of the lies, misinformation, and half-information posted by conservative bloggers, interspersed with the complete abdication by mainstream media bobbleheads and bloggers to do basic fact-checking. Or, you know, to contact the Obama campaign and ask for more complete details about the planned visit.
Notice that McCain's smear began on 24 July, and the Washington Post didn't set the record straight until the 30th. That's some fine liberal media work there, Lou. As for McCain, he's happy to continue repeating the lie even though there is no evidence to support it:
Despite serious and repeated queries about the charge over several days, McCain and his allies continued yesterday to question Obama's patriotism by focusing attention on the canceled hospital visit.