UPDATE - Feb 21 ’12: Spring Framework has moved to GitHub, and for 3.2.x development has moved from Ant to Gradle. Take a look at the building from source section of the README there for (greatly simplified!) instructions.
As Juergen announced last week, Spring 3.0 Milestone 2 is now available. In this post, I’ll show you in six steps how to download and build the latest Spring 3 sources and get a development environment up and running in Eclipse.
We’ll wrap up by discussing the best ways to follow Spring 3 development, how to file bugs and improvement requests, and considerations for compiling against locally-built Spring 3 binaries in a Maven environment.