Are "Rails fanboys" really complaining about lack of IDE support? I was under the impression that IDEs weren't especially popular among Rails programmers (as compared to Vim and TextMate).
(Doug Hoyte disagrees with me on the vi point, arguing in his book that Lisp is expressive enough not to require any editor support. I respectfully disagree.)
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.