At its upfront presentation, which took place at the Hammerstein Ballroom in New York City this morning, top-rated kids net Nickelodeon assured the crowd of advertisers that multiplatform programming will stay at the forefront of its 2008/09 scheduling strategy.

As part of its annual pitch, Nick announced new programming initiatives, including an original primetime-TV movie slated for air in August, Gym Teacher: The Movie and a music-based live-action comedy series titled One 4 All, which is the first TV fruit of the net’s partnership with Sony/BMG Music Entertainment announced last year.

Nickelodeon is also trying to help kids help the earth with its new global multiplatform pro-social environmental campaign The Big Green Help; the centerpiece of which is being touted as the first-ever green global multiplayer online game for kids. The game intends to provide kids with actionable, measurable steps and information so they can each help the environment on an individual and community level.

When it comes to the net’s stalwart shows, never fear. Both SpongeBob SquarePants and The Fairly OddParents have been picked up for 26 and 20 new eps, respectively. Additionally, Nick original Back at the Barnyard will return with 20 new eps, and preschool series The Backyardigans is back for a fourth season with 20 fresh installments.

For the sizzle part of the event, Nickelodeon previewed the forthcoming animated series The Mighty B! co-created by Saturday Night Live star Amy Poehler, which will premiere on April 26.