With 20 million lines of open code, 23 756 individual contributors, and about 500 companies from 162 countries involved, OpenStack is the de facto reference for private clouds. Do you need to be convinced? Paypal just announced a massive migration from VMWare to OpenStack, following the likes of Walmart (100 000 virtual machines available as a service), eBay, AT&T, American Express, Sony, Time Warner Cable, BMW, Disney Studio, Best Buy, Comcast, and many others, including (last but not least) the Seneca Academic Cloud. Even though Canadians have been adopting OpenStack prudently, the rate of implementations seems to accelerate in the public sector, with big banks, and with hosting providers. We'll discuss trends in cloud technologies, some exciting projects on-going in Canada, and some lessons learned. We're looking at the cloud through the lenses of the Free Software principles. We'll share some advice with those considering a large-scale OpenStack implementation.