I've been working in organizations that adhere to some level of the CMMI for some time now. And we are trying to fit what we can of agile programming into our process, and hopefully are achieving better results while still keeping the structure required of our contracts.
A long time ago I ran across this article which discusses some of the levels of process that are often encountered in the wild, but rarely discussed by SEI.
So here's the The Capability Im-Maturity Model (CIMM) as envisioned by Capt. Tom Shorsch USAF.