A robust LMS of ACS 3.x is still atractive as a package for use by a lot of the nonproifit community. I'm not sure anyone would want to continue development on it in 3.x, but if it was ported to 4.x (even without being a part of dotLRN), I can think of a number of folks that likely would be interested in both learning and extending it in the nonprofit sector for corporate learning scenarios.