IMP 2.2.0 is now available. It contains a number of new features, notably support for SOAP scoring and a more reliable RMF file format. See https://github.com/salilab/imp/releases/tag/2.2.0 for the full change log.
Check it out at http://integrativemodeling.org/
As always, we'll make a a 2.2.1 release in a few weeks if any significant bugs show up in 2.2.0.
Ben