@martindurant is this helpful at all for our conda recipe issues? Just missing Window's PyPy...

Good enough for me! I'm not going to stretch too far for pypy, especially since fastparquet, the first user of cramjam, dopesn't run on pypy anyway (because of numba).

As far as conda-forge is concerned, let's release a new version with the allocation updates sooner rather than later. Perhaps should open a new issue of things we'd like to see happen by that release.

Great, was going to merge this then #26 if you're good with that.
Is it also okay with a 2.0.0-rc2 prerelease, as would still like to do some minor housekeeping; although admittedly nothing that would affect the major/minor version I guess.

Is it also okay with a 2.0.0-rc2 prerelease

I've never done this. For pydata packages, most just inc the smallest number as seems fit. We don't strictly semantic-version, and indeed many are coving to calendar-version to avoid any confusion.