From Reg Developer:

Right at the end of OSCon in September, I got the opportunity to harangue Ubuntu's Mark Shuttleworth about the support vacuum distros such as his create. He didn't have an answer. OK, I was putting him on the spot, but I don't think he'd have done much better if he'd had notice of the question. Frankly, I don't think there is an answer.

Read the full thing at http://www.regdeveloper.co.uk/2006/11/04/apache_packages_support_vacuum/

Handy link from the article: http://wiki.apache.org/httpd/Recipes/DistrosDefaultLayout