If working at a major DoD contractor taught me any anecdotal lessons about software development for the government, its that you are basically disqualified, by logistical means, from making software for the government if the dollar amount in question is anything more than a drop in the bucket for your budget. That may just be a DoD reality, but I wonder how true it probably is for Federal entities.

I'm with markus2012 here. I have a profitable product already in place that would give me a significant head start on those requirements, but I'm still not at all prepared to head down that thorny trail.