In terms of production-ready, we ship Hawkular with OpenShift to Red Hat customers, and we are about to ship it to CloudForms customers as well.
It's still in very active development though and we are head down in it, so we haveń't make a lot of noise on Hawkular so far. We lost our GitHub star history on a repository rename, so that didn't help on that side :) Feel free to star us ;) (The number of repos is also not really helping ;))
We welcome all contributions of course (or ideas, feedback), the more agents/usecases will have, the more the community will grow, at the moment we have Wildfy and OpenShift agents which are very important for us, but other agents would definitely help community awareness.
Could you tell us how you'd like to use Hawkular ?
Thomas