[mistermann]

If it's not harmful to any competitive advantages you have, it would be lovely if you could do a blog post of all the open data sources you know of (or, are there any directories that maintain up to date lists of open data sources?)

[j_s]

https://github.com/caesar0301/awesome-public-datasets is a start

[msielski]

I have a hard time navigating it, and it's USA only, but there's http://www.data.gov/