http://code.google.com/p/polarrose-jmx-rest-bridge/ is one possibility
Create a dazzling web ui for cassandra
Michael Greene has something jetty-based now.
irc: "I have an http solution through jetty that I'm testing out locally. working on an interface for it."
Haven't heard anything from Michael in a while. This is fair game if someone wants to run with it.
polar rose does work nicely, and does not need any special help from Cassandra.
Some discussion of another jmx/rest bridge on CASSANDRA-918, fwiw.