It might be obvious, but

• Not just open source, but the collaborative tools and ideas are really powerful

• • How can the military keep track of issues when users are (really) widely dispersed?
  • What if the solutions are of interest to those outside the requirements chain?
  • NNTP, CVS
  • Incremental upgrades, FAQ

• Most people don't know about these things

• or

• really how to use them!