Ok, cool. It wasn't clear whether you wanted Clojure-only, or might be interested in other acceptable JVM-based ones. As for Lift, the folks on the mailing list (liftweb @ Google Groups) are very helpful when it comes to figuring out whether Lift is appropriate for any given project or not (basically, do you specifically need its features and have a developer team with the ability and bandwidth to ramp up quickly enough for your deadline).

PS - nothing against Clojure, not trying to hijack this whole thread, just add to it. Clojure + Scala makes the JVM a truly awesome platform. The power and features of both Lisp and ML, the brevity of both.

Note that everybody says Noir because Noir is the only thing that could be called a 'framework'. I pretty sure most clojure webapps are not written in Noir itself, people use all kinds of diffrent combinations of librarys to gather alot of the feature a framework would give you.