[HoneyAndSilicon]

From what RWW says further down, Amazon must already have the software in place - and be collecting it in NY state:

"The Colorado legislature should have foreseen this outcome - it's not the first time Amazon has been forced to shut down affiliate programs. In July of 2009, Amazon closed off their programs in Rhode Island and North Carolina, and has previously sued over a law passed in New York in 2008. The suit, however, was eventually thrown out and Amazon has since been paying taxes for New York affiliates they feel are too valuable to give up."

So I still don't see why Amazon is choosing to fight this battle with Colorado :/