The latest from the ISU (via an interview with Ottavio Cinquanta for IceNetwork) indicates they hope to have a relocation announcement for Worlds by this Friday (March 25)... and that the relocation will be in late April or early May in either North America or Europe.
Read the newest article here.
If you're interested in the criteria a "host city" needs in this situation, chcek this post from Vlad at the World Figure Skating blog.
More soon... (we hope)
P.S. While I'm painfully aware that folks in Japan probably have much, much more important things to do right now than keep tabs on the skating blogs... I'd still love to hear from you if you happen to stop by. Please let us know how you're doing if you're so inclined.