God Yes, NIMS training was by far the most useful and relevant training I've received in the fire service...in the current era, the problem with interagency communications is not *tech*, it's *rules*, and I was thoroughly impressed by NIMS' common sense, 6th grade reading level, scalability, and "rules for new rules".
It's a very realistic framework that accomodates, among other things, the fact that you and everyone else has other things to do and to remember, that your personnel are going to have IQs from maybe 85 on up to 150, that if you don't figure out how everyone gets paid you can't figure out anything else, etc.
I kid you not, FEMA's NIMS 100
(or -700) training is the best free mini-MBA you could give yourself. Pushing old, unsexy NIMS will do more than any amount of shiny radios or infinite numbers of useless "command center" RVs,