This task has traditionally been managed by the Carnegie Mellon ETC. Josh Yelon was the individual most recently in charge of this officially, but he left the ETC over a year ago. (In the interim, rdb was kind enough to volunteer his time to make a few needed releases, but rdb is not the official release maintainer.)
This position remains unfilled. It may be that the ETC will eventually find someone to take up this role again in an official capacity. In the meantime, it will only happen on a volunteer basis.
Would you be interested in volunteering?
David