Fun new alpha from Yahoo: Me2U,
which is basically person to person marketing, for fun. You create a
nice flash ad unit, the squarish size that shows up all over the place
on content pages on Yahoo, too frequently with inhuman, badly drawn
dancing automaton's trying to sell you a refi. Then you enter your
target's emails and they see a personalized ad among the other ads they
are (probably) tuning out...
Send personalized messages to your friends and family as banner ads on the Yahoo! network.
Very cool: ads become "hackable" and useful for the little guy. Aside from classifieds, which Craig and his list have done in, who would have previously perceived a need for this kind of functionality. Nice idea Y!.
Open question: you've got so much great web 2 stuff under your umbrella, can you just make another big play here, blow through some of the internal barriers you seem to face in product dev / management and tie all Y! things social into a big awesome bundle.