I just noticed that Google Maps provides topographical views of the ocean floor. See Japan, for example:

   http://maps.google.com/maps?ll=38.131320,139.265898&spn=25.011882,31.285860&z=12&t=k&hl=en

I'm not sure whether this is new, but it's very cool.

Yeah, that is awsome.

always been there but it is cool.