The decision to stop daily updates by the hospital of Pittsburgh Mayor Bob O'Connor's condition is apparently what led to everyone and his brother hearing the false rumor that O'Connor had passed away yesterday.
While I did receive a couple of emails yesterday afternoon, from what I heard the MSM (radio in particular) was far more active in helping to spread the rumors than the supposedly error-filled blogosphere.
I saw nothing on any local blogs until well after the rumors had been put to rest.
KDKA seemed to have the most coverage. Video available here.
Obviously, the wildfire rumors that Mayor O'Connor had died must make a bad situation even worse for his family and friends...
For future reference, it was reported that if the worst came to be, City Council President Luke Ravenstahl would be almost immediately sworn in (with time given to the media to cover the event) so it's unlikely that you'd be hearing any terrible news from an email that you could not verify yourself through, say, the Post-Gazette or local television stations.