On our openArchitecture conference in Bonn, Jürgen Höller (lead developer of the Spring framework) met Walter Bischofsberger (founder and lead developer of Sotograph, a really cool architecture analysis toolkit).
Jürgen sat together with Walter to examine the current Spring architecture with Sotograph,
after some 30 Minutes (oops - really quick, isn't it?) they identified a few minor symptoms, which Jürgen rushed to fix on-the-fly.
That was a good demonstration of both the architectural quality of Spring and the power of Sotograph (and, of course, of the deep knowledge of these guys in their domains...).