Due to ClojureScript I have been going about learning Clojure the past few weeks. For anyone in a similar boat found a fun little site http://4clojure.com/ that teaches you Clojure by coding on the website which is pretty cool.
I think the only restriction is passwords being more than 7 characters, but if you raise a ticket the team _will_ look at it.
Username (4-13 chars.) Password (7+ chars.) Repeat Password Email
- It starts very gentle but progresses quite rapidly.
- The problems are small and geared towards idiomatic functional programming, which is why I found it more useful than projecteuler for learning Clojure.
- There's also a neat code golf/comparison feature, so you can compare your solutions to others.