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.