Great article. It's too bad the code samples weren't syntax highlighted; I had a hard time following along in monochrome and ended up just skimming most of the code.
http://groups.google.com/group/clojure/browse_thread/thread/...
It's a bit of a sidetrack but you can use the same javascript library from both sides :
http://briancarper.net/blog/415/clojure-and-markdown-and-jav...
For DBs and Clojure in general I can only speak about CouchDB via Clutch and SQL via ClojureQL and clojure.contrib.SQL. I don't want to claim to be an expert in either of these technologies, but if you have some more specific questions i'm happy to do my best to answer them. you might find some answers about couch in an older post of mine http://brehaut.net/blog/2010/couch_impedance