'Private Practice' adds showrunners

Plus the latest pilot buzz

Robert Rovner and Jon Cowan have been tapped as executive producers/showrunners on ABC's drama "Private Practice."

The ICM-repped writers succeed Marti Noxon, who was brought on to run the show for its freshman season and is now moving on to other projects.

Creator Shonda Rhimes will remain the lead creative voice of the "Grey's Anatomy" spinoff, which was renewed for a second season.

While there is little intrigue about ABC's upfront presentation -- expected to feature only a couple of new scripted entries, drama "Life on Mars" and comedy "Scrubs" -- the guessing game continues about what pilots will make the cut at CBS and Fox.

Dramas "Eleventh Hour" and "The Mentalist" continue to lead the pack at CBS, with "Mythological Ex" and the Geena Davis project still looking good. Gaining momentum are Meredith Stiehm's "The Tower" as well as the Jon Turteltaub-directed serialized horror drama, which is eyed for a limited order.

The untitled Ed Yeager and "Worst Week" are getting buzz on the comedy side, with "My Best Friend's Girl" and the untitled Mike Birbiglia project also in the running.

On the bubble show front, "The Unit" is said to be moving closer to a renewal.

Drama "Fringe," which already is staffed, continues to be the surest bet at Fox, along with Joss Whedon's "Dollhouse."

Meanwhile, the network has passed on high-concept drama "The Oaks," which is being shopped around by 20th TV.

Aside from the "Family Guy" spinoff "Cleveland," things are said to be up in the air on the comedy side, with the Bernie Mac starrer "Staring Under," "Spaced," "The Inn," as well as cartoons "Sit Down, Shut Up" and "The Pitts" under consideration.