I see that Software Bisque is doing some cool stuff in this space. See their blog:
http://www.bisque.com/sc/blogs/seeke...-a-tablet.aspx They've got SkyX running on a Raspberry Linux machine driving Robofocus and SX gear.
Also, they are playing with a 'BeagleBoard'? I might just hold out for whatever SB brings to market. SkyX X2 driver support is a big thing. Robofocus. Canon. Sbig. It should all be there, eventually...