Just three days after starting his new job at Sirius Satellite Radio Inc., shock jock Howard Stern is now able to sell the roughly $200 million in Sirius stock that he received as part of his five-year deal with the company. Sirius' contract with Stern runs through 2010, but the company disclosed last week that it was giving Stern and his agent 34.4 million shares of stock right away because it had already reached certain undisclosed targets for subscriber growth under the deal it signed with Stern in late 2004. On Wednesday, the company made another regulatory filing saying that...