SuperheroHype has scored five pictures of Megan Fox arriving somewhere in LA for "previz shots" for Transformers 3. It also appears the Bumblebee Camaro is on hand.
I am a bit confused by the previz note as typically pre-viz is basic computer animation of a director's vision, as needed, for scenes in a movie. Actor involvement is typically not necessary in producing them. The remaining four images, which show the lovely Fox walking and waving at people across the parking lot, can be found here. Principle photography for TF3 is expected to start in a week or two in LA. Thanks to Charlo for the link.
Update:Superherohype pulled or moved the article so the links no longer work, click here instead to view the images.