Recently I’ve been working with DTO Solutions and Zenoss to develop a barclamp for Crowbar to monitor your Crowbar installation with Zenoss instead of Nagios, if you’re into the ease and smooth goodness of a premium monitoring solution. (They didn’t pay me to say that. I just thought it was cool.)
I did a screencast to demo the project, and the DTO guys were kind enough to host it on their Vimeo account. Damon’s waxed poetic about the Crowbar project and linked to the screencast as well. You should seriously check out that post.
You can get the code for the barclamp and play with it at my github account.