Michael Arrington over at TechCrunch has posted a great article on Bear Stearns "suggestion" (I take it as a demand) that Yahoo establish a social networking function. His article seems to point to aquistion of Facebook. It seems Yahoo!'s playing catch up in two major areas: social networking and videos. And given the emergence of "plug-in" applications like the one SBS uses for its social network, the hole Yahoo! has to dig itself out of is getting deeper still.
I personally think Yahoo! needs to come up with the a next-generation web portal format. I know what they should do, but they'd have to pay me to tell them.