Yesterday morning Patrick Altoft tweeted to me that SearchMetrics is reporting Expedia lost about 25% of their Google traffic overnight.
SearchMetric is indeed reporting this and I confirmed it with Marcus Tober from SearchMetrics via email. I posted the story on the traffic drop at Search Engine Land and asked if it was related to the link buying allegations Expedia was surrounded with last month.
A Hacker News thread, that I've been following for the past couple weeks has more details about how Expedia may have been involved in link schemes and may have received an unnatural link penalty by Google. Google has not yet responded to my inquiries about the penalty. So I have no confirmation from Google or Expedia about it.
SEM Rush shows no drop off in traffic: