It can be used to publish simple websites pretty elegantly, but for now it is relatively "low level"- I would say it still has a ways to go before being "Rails like."
I wouldn't discount Clojure as not ready for complicated web applications based on it's young age; Java servlets can be written in Clojure. Not that Java servlets are great, but they are widely used for non-trivial web sites.
Clojure is great at removing the ugliness of some Java APIs, I recall that Compojure is built atop servlets.
This functionality has been merged into Ring 0.1, so you may now be able to wrap a Conjure application into a Java servlet as well.
Clojure is already pretty mature- Compojure is still the part that's excellent but still low level.