Good advice about crisis blogs on Corporate Blogging.

"If done correctly, corporate blogging in a crisis can significantly
enhance communication with external and internal stakeholders. But I
always caution management that despite their dramatically increased
popularity, blogs are just one of many traditional and online tools
that should be considered. In the end the right mix of communication
tools and using the blog wisely within that mix are vital to responding
to a crisis successfully. If management doesn’t heed that advice,
blogging in times of crisis can easily backfire because blogs are all
about the open exchange of subjective opinions, and corporate blogging
therefore translates into relinquishing communication control."