I can't help but feel that Yahoo! signed its own death certificate when they so loudly fought off Microsoft's handsome buyout offer. Would Yahoo have taken this offer, at least Yahoo would have the potential to still exist and be recognized. It would've been interesting to see how it played out. In a round about way, we can even look at Yahoo as a modern Netscape... they stood up to Microsoft and bit the bullet in the end.
AOL is probably most remembered for their annoying "Free Dial-Up Internet Trial" CDs in the mail that were more cumbersome than spam, what is Yahoo going to be remembered for?