Many interesting topic were discussed at the Ubuntu Cloud Days. If you miss it, here are the logs for you to catch up!

Getting started with Ensemble — kim0
Introduction to Cloudinit — koolhead17
Orchestra and Ensemble (part1) — smoser
Orchestra and Ensemble (part2) — RoakSoax
Eucalyptus 3: cloud HA and ID management — nurmi

Getting started with OpenStack Compute — soren
UEC on Ubuntu 10.04 LTS — TeTeT
Node.js/Mongo with Ensemble — m_3
OpenStack: An open cloud infrastructure project — ttx