May is not programming, and math is often handwritten, so there is a lot of friction in setting up a DCVS for &quot;scratch work&quot;. Polymath was rather awkward, and I would guess it was either (a) an easy problem for the (genius) solvers, relative to regular work, and (b) an annoying data transfer.<p>But here are certainly room for improvement above Blog Comments as a collaboration UI. Even a google spreadsheet would have been better.