Don't know if this has been posted elsewhere, but at this link there's a remarkable sound recording of the main quake from an underground monitoring device.

Below that is a video I hadn't seen that's another stunning view of the water pouring into a town.

http://news.yahoo.com/s/yblog_thelookout/20110318/ts_yblog_thelookout/listen-to-japans-massive-quake