Clearwire has added a pay-as-you-go option for its 4G wireless broadband service. Aimed at "tech-savvy Gen Y customers" looking to avoid lengthy contracts, the Rover Stick and Rover Puck offer commitment-free access to the company's WiMAX network. Priced at $100, the " that you can buy a Rover and pay for 12 months of WiMAX upfront for $500 ($100 off) with the coupon code "Crazy."