Speaking Friday at the Television Critics Association, Showtime made a host of programming announcements, the most salient of which is its renewal of its Mary-Louise Parker dark comedy series Weeds , and handed out some series orders. The pay cabler has renewed Weeds for two additional seasons of 13 episodes a piece. Which means that the series will air its fifth and sixth seasons--which follow the misadventures of suburban pot-dealing mom Nancy Botwin (Parker) and her eccentric associates and family members--in 2009 and 2010 respectively. Weeds is currently airing its fourth season on Monday nights at 10 pm ET/PT. Showtime handed out series honors to the untitled Edie Falco comedy pilot, which will now officially be known as Nurse Jackie . (The name follows a series of name changes over the last few years for this long-dormant project, including Nurse Jenna, Nurse Mona , and Nurse Helen .) Edie Falco will star in the half-hour comedy series about a tough-as-nails Manhattan nurse who