A defense industry blogger at About.com is reporting that DCAA has identified a couple of areas of emphasis in their audit activities.
Business Development vs Marketing: They will be looking closely to determine if marketing costs, which are generally not allowable, are getting rolled into contract specific business development costs, which are allowable.
Travel Expenses: They will also be looking closer at Per Diem expenses for unallowable overages based on your location.
Best of luck with splitting time spent on business development from time spent on marketing. And make sure that business lunch is within your M&IE limits.