Appleinsider: a Chinese web just posted pictures of the new iPad 2, which will be officially introduced by Apple in less than an hour and a half. The Chinese page with the original pictures, apparently called DGtle, is here. The new model is thinner than the original iPad, with the sides curved, getting even thinner (in a way similar to the original MacBook Air). Besides, there are actually the widely expected two cameras (front/back, enabling the device to use Facetime); the size of the speaker seems to be bigger. Apparently the structure is aluminium, or at least with the same aspect as aluminium.
But roughly speaking, the iPad 2 looks quite similar to the original model. Let's wait until the actual introduction of the model to know the full specs.