Looks like Arizona is refusing to "come on board", which is either good news to slow this down, or bad news to make it really confusing for online stores to track and collect different amounts from different states (or none at all)
What's with the word "allowed"? Like they ASKED to add this charge to their customers?
It's interesting to note that even in 2003, Alaska, Delaware, Montana, New Hampshire, and Oregon do not collect sales tax. In Florida we had a "no sales tax week" for a few years, for the week before back-to-school, and consumers loved it (regardless of the fact it barely added up to anything for one week). They got rid of it last year as the state said it cost them too much revenue.