Even if you somehow tackle image translation, those crappy auto-translated pages will look even crappier. As an example open www.sun.com and try to imagine what would happen to their front page. "Sun" and "microsystems" on the logo will be translated too, not to mention that the whole graphical look of the page will be ruined, which won't be welcomed by the owner of the web site.

(Not that I care about Sun's web site too much, but this is an example.)

Isn't translating img alt's enough?