Today at PPA's ImagingUSA 2013 I saw a prototype of a new tool for stitching rectilinear panoramas from Forodiox. Right now it is sized for the NEX-7 and similar micro format mirrorless cameras and is designed for use with Hasselblad "V" Series CF lenses. Essentially you move camera from left to right and then then a second row. This takes care of parallax issues as the lens remains stationary. In the works is a version to work with APS-C and 24x36mm and also medium format digital backs on a 4x5 camera chassis. Supposedly these will all be market ready in 2-3 months. Should be nicely machined, and reasonably priced.