Z5xx series Atoms ( http://en.wikipedia.org/wiki/List_of_Intel_Atom_microprocess... ) had PowerVR GPUs (they call it GMA 500, but they have nothing in common with Intel's own GMA's!), the ones that are normally used with ARM CPUs. Sony Made ultra-portable Vaio P-Series with them ( http://en.wikipedia.org/wiki/Sony_VAIO_P_series )

Unfortunately, it looks like it all was a fluke. I haven't heard of any notebooks with Atom Z6xx series, presumably because Windows won't run on them because they don't have a PCI bus. With the architecture consisting of a single model (Vaio P-Series) the possibility of running Linux is vanishing: there was a special build[sic!] of Ubuntu that should run on it, but that's it.