suraj.sun writes, quoting the Denver Post: "A federal court has thrown out a 2010 Colorado law, which had already been temporarily blocked in federal court last year, meant to spur online retailers like Amazon to collect state sales tax. 'I conclude that the veil provided by the words of the act and the regulations is too thin to support the conclusion that the act and the regulations regulate in-state and out-of-state retailers even-handedly,' U.S. District Judge Robert Blackburn wrote in his opinion. The law and the rules to carry it out 'impose an undue burden on interstate commerce' and are unconstitutional, the judge wrote. The tax mainly affected online sales of out-of-state companies that have in-state affiliates, usually generating sales through links on their websites." I wonder what this means for the plethora of similar bills in other states. Will Amazon continue to call for a national Internet sales tax if they are all struck down?