We're already making a lot of use of it. It needs a cleanup though so that argument orders are the same, keywords are the same, and needs documents with example usage.
It's currently in statsmodels.s…
Something as simple as `library("lme4"); example("glmer")` segfaults with R >= 3.0.0 and development lme4 (fonfirmed by BMB: 32-bit Ubuntu, R-devel (2013-04-25 r62670); SCW: MacOS, R 3.0.0). Running …