Skype has been long developing a version of its VoIP app for Intel's Mobile Internet Device (MID) concept handheld... check it out:
Intel's hardware designs are purely conceptual – they're intended to show device makers what the chip maker's silicon makes possible rather than be products in their own right.

These handhelds are intended to run Linux, the version being developed by the Intel-backed Mobile Internet Linux Platform. Skype's targeting the MILP OS, and it said it expects to get the software ready for release sometime during the first half of 2008.

Not coincidentally. the next major release of Intel's Ultra Mobile Platform, based upon the very low power 'Silverthorne' processor, is due to be launched later this quarter.

Intel has signed a stack of Taiwanese hardware manufacturers, including HTC, Compal, Asus, Inventec and Quanta, to make MIDs, and it's also picking up brands more familiar to consumers, like Samsung, BenQ, Fujitsu, Hitachi, Lenovo, Panasonic, Toshiba and LG.