Looks like they've got a pretty healthy base library set up, but I'd be curious if anyone's seen a thorough comparison of R and Incanter. Googling isn't much help.
There is also RIncanter (<a href="https://github.com/jolby/rincanter" rel="nofollow">https://github.com/jolby/rincanter</a>). From project's page: "Rincanter is a Clojure and Incanter wrapper around the Rosuda JRIEngine Java/R bridge. The hope is to allow easy access to an embedded R engine from Incanter. It also offers translation between Clojure and Incanter datatypes and R datatypes such as R dataframe to Incanter dataset."