I don't think strlen is being accurate by saying its "Ruby fanboys" who are the source of a lot of criticism. Clojure does have a lot of former Java developers who aren't used to non-IDE development on the JVM. Others don't like the apparent complexity Emacs comes with (Emacs, Slime, Swank, Paredit? All I want to do is enter some ascii characters and run a compiler!) That said, I think Clojure is improving in those fronts with broader editor support, guides to getting Emacs set up, and a growing list of libraries.
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.
