> Am I just missing something here or did they seriously cancel an entire conference just because of some random dude on Twitter imagining some nonexistent racism/sexism in the speaker lineup?

According to https://twitter.com/Rebeccask/status/270220165344550912 sponsors pulled out. It's not mentioned at all in TFAA though, so I'd don't know if the explanation's legit (and why they went with a non-explanation instead if it is)