So, the next stable release of IMP is coming up soon. My release criteria are pretty simple (let me know if you disagree ;)
1. The nightly build should be close-to-clean: http://integrativemodeling.org/nightly/results/ i.e. a) it should build, b) the documentation shouldn't be full of broken links, and c) the tests and examples should work (as completely as we can manage). I've already taken care of a) and b) and am working on c). If you can take a moment to look at any modules/applications you work on and see if you can help out with any test failures, that would really help!
2. All the IMP issues attached to the "IMP 2.2 release" milestone should be addressed[*]. If you have a "favorite" IMP bug that isn't in the list at https://github.com/salilab/imp/issues?milestone=7&state=open, go add the 2.2 release milestone to your issue, otherwise it likely won't get fixed. (And if it doesn't have an open issue at all, open one...) Those currently in there shouldn't be too disruptive, although I will be removing the code we deprecated in 2.1, which will likely break a few things.
3. The biological systems at http://integrativemodeling.org/systems/ should all work with latest IMP. (I'll start a run of them once the deprecated code is gone - most likely some of them use at least one deprecated function.)
[*] Not necessarily "fixed"... we may decide to push some issues back to the next release.
Ben