We have the inaugural run of our 1-day Zenoss FastStart Introduction workshop on November 17th in Maidenhead, UK. Details at http://www.skills-1st.co.uk/products/courses/zenoss-faststart.html . It is really aimed at those folk who "have had Zenoss on their list of things to do for a while but not quite got around to it yet".
The idea is to install Zenoss and then explore discovery, availability, events, performance and reports (don't expect long coffee breaks!). We provide laptops or bring your own (with VMware) so you can take your running Zenoss back to your organisation and continue the good work there.