The Zune has no hardware-level shader support, so HLSL doesn't make sense.
if there a way to create games easely on windows mobile
then xna is boarded the limits.
Windows Mobile support would be a natural progression, but there are literally hundreds of configurations that must be investigated, rather than one for the Zune. Windows Mobile support is definitely being investigated, but there's nothing to announce right
And i think on the winows mobile
there is a directX API and direct 3d.
Those APIs are poorly supported on mobile devices, if they're supported at all. I think this emphasizes the challenges Microsoft faces in supporting a full-fledged graphics API on mobile devices.