Overstock.com

(via Flickr/Robert Scoble)

Updated 2:12 p.m. March 11, 2011 to include Overstock.com information.

Amazon.com has made good on its threat to cut ties with Illinois affiliates because of a new law requiring the online store to collect sales taxes.

Amazon notified its Illinois partners Friday that it will stop doing business with them on April 15. It calls the tax law "unconstitutional and counterproductive.