Your best bet would be to post on the gumstix list.
I have a couple verdex XL6P boards, with the netwifi-microSD board, and an audiostix2. The wifi works great once you get it set up with your router. My brother Dave, one of the regulars on the gumstix list, has an enormous amount of experience with the robostix, so you'd be best to ask there...
- Jon