Lessons learned defying Joel Spolsky with Django by Nick Bruun
I love the fonts - would really appreciate help in identifying the fonts.
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The font is called Bariol.
And, so you know how I figured it out (even though I've never heard of the font before), I downloaded the presentation PDF and then opened it in Illustrator. Illustrator was happy to tell me which fonts were missing from my system:
definitely the Bariol, -Thin , -Light, -Regular and -Bold