• Apps4ClimateAction: The Government of BC has announced Apps4ClimateAction, a contest for applications that raise awareness about climate change, with a prize pool of $40,000. Apps vying for prizes can tap into a surprising number of contributed data sets from provincial, municipal, and federal governments – as well as data sets contributed by non-profit partners. Negotiating the release of this flood of information from so many diverse sources is a tremendous achievement by contest organizers.
• City of Edmonton: The City of Edmonton released a timeline for their Apps4Edmonton contest, which will offer up to $50,000 of prizes. Apps4Edmonton follows an innovative contest structure: In the first phase of the contest, citizens – even non-techies – can submit and vote on ideas. The ranked idea list is then published, and coders can start submitting their apps. Winners will be showcased by the city at GTEC, Canada's conference on Technology for Government.
• ForTheWeb: MakeWebNotWar, a series of Canadian web design conferences and coding competitions, has included an open data prize category at their ForTheWeb event happening this May in Montreal. Apps built on a number of listed Canadian municipal data catalogues can be entered in pursuit of fame and a Dell Compact Desktop.

• Missasauga quietly launched a data catalogue on March 8th.
• Calgary passed a motion to launch an open data catalogue in 2nd quarter 2010. You can read full text of the March 22 motion on p26 here (pdf), as well as a first-hand account of the citizen action behind it.

Is your city thinking of an open data catalogue? Need some inspiration for getting started? OpenMuniWiki, by the Open Planning Project, compares and contrasts a number of open data policy models from cities around the world.