I've successfully had printed 7.7mm dia x 32tpi threads in
Strong & Fflexible, however there's no guarantee of the print orientation and the option of small, medium, or big printers used for WSF. Generally smaller items would go in the small printer, and large items in the large printer. The accuracy and toerances are best with the small printer, worst is the big printer with as much as 0.2mm deviation within a print. There's a lot of uselful information in
Bart and Alan's January Shapeways Live which helps in understanding some of the limitations of the technology.
Threads should also work well with
Fine Detail and
Frosted Detail with Frosted Ultra Detail having the best accuracy, however being acrylis, the materials are more brittle than S&F.
As for poseable hands, get inspiration from what's already been done, the model you linked to is pretty easy to work out the mechanics, but it would take a couple of trials to get the right ball & socket dimensions, the same or +0.1mm for the ball should work but as mentioned before for S&F, there can be some deviation in dimensions.
Paul
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