The LA Times is reporting that Google Maps is indicating which roads in Japan are thought to be passable.

They are also reporting that Google has satellite images of Japan from after the earthquake. There are before and after comparisons.

http://www.latimes.com/news/nationworld/world/la-fgw-japan-quake-google-images-20110312,0,7929784.story

Example:

http://www.latimes.com/media/photo/2011-03/60076203.jpg

http://www.trust.org/alertnet/news/japanese-inspired-and-angered-resigned-to-more-quakes/

Also
http://www.gearthblog.com/blog/archives/2011/03/brand_new_google_earth_imagery_of_p.html

http://www.gearthblog.com/blog/archives/2011/03/12/tokyo.jpg

Also http://japan.person-finder.appspot.com/?lang=ja
is working

http://www.flickr.com/photos/digitalglobe-imagery

Many of these references and sources via
http://infodocket.com/2011/03/11/japan-earthquaketsunami-resources/