Following yesterday’s appearance of photos showing a purported iPad 3 back panel, a number of new images of a similar part have appeared online, joined by several new rumors. Citing unnamed sources, AllThingsD reports that Apple will debut the iPad 3 in the first week of March at a special event in San Francisco. The typically well-connected publication speculates that the event will be held at the Yerba Buena Center for the Arts, and that the…