Macles got its hands on pictures of a thinner Aspire One netbook from Acer:
You'll notice it is thinner than current models, which indicates a SSD only model. Another clue is the return of the SD Expansion slot. The software based functionality of it was only used in Linux, so unlike with the just released 10.1" AA1 a Linux configuration might be available again. The only thing that indicates otherwise is the Windows key. Linux models have a home key with a little house icon instead. It'll likely be available in both configurations just like the first generation AA1.