I think there's at least one clojure plug-in for each of the main Java IDEs:
Enclojure (NetBeans)
Counterclockwise (Eclipse)
La Clojure (JetBrains)
The other thing that has really improved immensely is "project management" (right term?) provided by Leiningen. Now you can basically do "lein new proj_name", then edit a simple config file in the created directory and do "lein deps" to get all the packages that you referenced.
Plus "lein swank," which once you've got slime set up is an absolute godsend. The two things I do first on a new machine are install clbuild to get slime and the emacs config, then leiningen to get clojure working. It does make things nice and simple.