Goodbye Yahoo! Maps...

[Eric Smith]

> Yeah, nice interface, but don't try right-clicking so you can save the
> image for a document or anything. You can't.

That's at least partially for technical reasons.  The map you see is
rendered as a bunch of tiles, not a single image.

There's a fascinating exploration of the details of how they make
it work here:
    http://jgwebber.blogspot.com/2005/02/mapping-google.html