Re. challenging problematic ideologies that get wrapped up into technological decisions in Wikipedia, I've done some relevant work. See:

Halfaker, A., Geiger, R. S., & Terveen, L. G. (2014, April). Snuggle: Designing for efficient socialization and ideological critique. In Proceedings of the 32nd annual ACM conference on Human factors in computing systems (pp. 311-320). ACM. http://www-users.cs.umn.edu/~halfak/publications/Snuggle/halfaker14snuggle-preprint.pdf

See http://snuggle-en.wmflabs.org/ for the live system.

For upcoming projects, I'm excited about http://passingon.natematias.com/

-Aaron