9to5mac have reported that Apple were filming ads for the next generation iPad as early as last month. The ads were reportedly shot at New York's Pier 59 by David Sims, a British photographer.
Current generation iPads were used at the shooting of the ads and will be swapped out for the new model in post production. A participant at the shooting, said that there were no new products on scene, and that everyone had to sign non-disclosure agreements.
At this point, about the only thing we can confirm is that the new iPad 2's will probably be the same size as the current generation iPads.