Being a user of Camel and ServiceMix I frequently need to monitor those tools for development purposes. I mainly use JConsole to access MBeans from ServiceMix and Camel. It gives a few really helpful metrics for an ESB developer.
I also use karaf (web)console to track my route and bundles status. Looking around StackOverflow I found an interesting link that explains how to setup Hyperic HQ for ServiceMix 4: Monitoring Servicemix with Hyperic HQ.
Are they other tools you would consider worthy to learn/use for Camel/SMX Development ?
FuseHQ which is based on Hyperic is a product from FuseSource that is ready made for monitoring Fuse ESB, ActiveMQ, Camel etc. http://fusesource.com/products/fuse-hq/
Then there is also Fuse IDE which can monitor as well, albeith its tooling more focused for developers, to edit and design integration applications, for example with Camel, CXF, and AMQ. Fuse IDE is also capable of monitoring your apps at runtime, such as you can attach it to any running JVM that has Camel, SMX, ActiveMQ running, and you can gain insight and have UI tailored for those apps. http://fusesource.com/products/fuse-ide/
There is also tools such as Nagios that people use to monitor, but its more tied to JMX and log scanning etc. There is a camel-nagios component to send alerts to nagios from Camel: http://camel.apache.org/nagios
And there is commercial vendors, besides FuseSource, who are in progress of adding Camel dashboards to their apps.
There is also mcollective which can grab information from a cluster of servers. I have seen it integrate with AMQ etc: http://docs.puppetlabs.com/mcollective/