I pointed this out in another SICP thread, but it's worth restating for anyone who might be interested in Clojure but not want to invest in Scheme for SICP: The subset of Scheme that SICP uses is so small and simple, it doesn't take much effort to use that to do the exercises in the books. Doing everything in Clojure would likely distract from the core concepts, many of which are related to Clojure's philosophies.

I would be sad if anyone waited for one of these SICP-in-Clojure projects to be finished before even starting to read SICP.