Small, Robust, and Portable WinCE-based USB Masters?

Dandre asks: "We have come across a need for a very small and robust USB master to portably read data off a USB device. It should have significant memory (>256M), but ideally needs to be robust to vibrations (such as running). Our initial searches have found that no WinCE like-handhelds are USB masters (except one that is a master in the cradle, which is unacceptable). We have software what does this for a Win32 laptop PC, but most laptops fail the portability and size tests. Ideally, we would want a solution that allows us to easily port this code -- so WinCE initially seemed like a good idea, but the reality of the WinCE situation makes us, well, wince."