Hey folks, If anyone is using Nagios to do any of your network monitoring, I just finished the initial version of a Cassandra monitoring plugin that is a fork of a much simpler version. Hope someone finds it useful. Right now I know it works with the 0.8 build of Cassandra, I'll update it to v1 once we migrate there (I don't know what JMX calls have changed at this point)...if someone wants to send me a list of updates to the JMX calls, I'll add them in and update it to handle multiple versions.
https://github.com/dmcnelis/NagiosCassandraMonitor -- *David McNelis* Lead Software Engineer Agentis Energy www.agentisenergy.com c: 219.384.5143 *A Smart Grid technology company focused on helping consumers of energy control an often under-managed resource.*