Somehow I get the feeling that the Clojure community is in the "marketing" phase of the language. I'm starting to see many Clojure threads popping up HN lately. InfoQ.com also increasingly added Clojure presentations/articles lately. It's all good, a little bit of competition between languages is healthy. Having said that, I believe it is hard for Clojure community to convert/invite people with what you guys have don…
I'm GLAD that there is currently no killer app for Clojure, like how Rails became the killer app for Ruby. IMO Rails killed Ruby. Ruby started out in the right direction but once Rails became popular there was an influx of so-so programmers who started polluting the language with inefficient concepts, constantly reinventing the wheel poorly because they did not know enough computer science to know that a better solution had already been invented. Now the system has been bogged down by so much cruft, it is difficult to see if it still serves the purpose it was originally designed for (a language the people can enjoy programming in).
Clojure is not ready yet. The core team is still working on refining the fundamentals for what maybe can become the 100 year language [http://paulgraham.com/hundred.html] -- look at reducers in 1.4. Right now Clojure doesn't need more people. It needs more smart people. If you are not smart enough to understand why it is worth switching to it, maybe you should wait a bit and let the design mature more. The killer apps will come. Clojure's ability to scale complexity will eventually overcome its current drawbacks, as the tools and the ecosystem matures.