Tweets from the widely followed accounts that appeared on Sunday evening suggest a connection to Anonymous. Unfortunately, the hackers' tweets were far, far less interesting than the usual fare from either show.
Update (8:22p): These tweets were deleted shortly after this item was posted.
Update (8:25p): Later Sunday evening, the hacker and The Daily Show staff appeared to be sharing control of the @thedailyshow account.
Update (8:30p): The hacker clarifies his or her affiliation.