Tradeshow Life, which always offered free job listings for employers, has added section called
HireOpps to expand on the concept. If you know anyone in the meetings/tradeshow business that's looking for work, either because of Katrina-related circumstances or otherwise, this could be something to check out.
Update: Busy guy that he is, Jeff has also just added some forums for people to post Katrina-related news, and other industry topics. Check it out.