IBM sues Amazon for patent infringement

Key aspects of Amazon.com Inc.’s retailing Web site are improperly built on technologies developed at IBM Corp., Big Blue alleged Monday in two lawsuits against Amazon. Amazon is accused of infringing on five IBM patents, including technologies that govern how the site recommends products to customers, serves up advertising and stores data.

Another day, another lawsuit. Am I the only one who wonders why these companies wait -so- long before filing such suits? Amazon has been using these techniques for as long as I can remember, so it’s odd to just jump up all of a sudden.