Yes, just over 1.5 years at ShareThis.  ~150 nodes managed by RightScale for ~$4000/mo (Premium account plus an add-on account for developers).  In this case, the "managing" includes rich metadata, server provisioning, configuration management, deployment scripts, monitoring, alerting, etc.  You can basically think of it as [Chef/Puppet/CFEngine]+Nagios+Cacti+AWS console+misc other tools, all wrapped up in a pretty (and very functional) GUI.<p>CloudKick's pricing puts it at about half that of RightScale (at our scale - I'm not sure how RightScale is priced at the bottom end), but it looks like the features are monitoring/alerting focused - the management tools appear to be largely undeveloped.<p>CloudKick is certainly making good headway feature-wise, and I'm glad to see them spin up their revenue stream.  I look forward to seeing what other features they add on in the future.