Personally, I'm moving away from using frameworks. Just starting to bang together all of the awesome modules from npm. (Mostly inspired by Issac's npm-www[1] for npmjs.org)
if i'm not mistaken, that is the entire point of Flatiron. just a collection of independent modules. use as much or as little as you want.
from first paragraph...
"Philosophy No one agrees on frameworks. It's difficult to get consensus on how much or how little a framework should do. Flatiron's approach is to package simple to use yet full featured components and let developers subtract or add what they want."