Yahoo is in such a strange position, in that they have a lot of great products, users and revenue and at the same time I can't think of a single big player that would want to own them, let alone for a fair price.
They do?
Flickr is great (with its 1TB of storage), though I recently tried to join '500px', since then flickr looks like desert with tumbleweed. It's a bit of exaggeration, though 500px is way more exciting, your photos are more easily shown to the public. People are encouraged to rate each other, etc. Also it has a marketplace. All in all 500px let's to improve my photography, whereas in flickr 90% people who've seen my photos are people, to who I've shown them. Also flickr's home page have the same set of pictures on carousel for weeks, where in 500px it's always fresh.
YQL can also be handy for some things. Yahoo site search "BOSS" was actually quite good too, but apparently was just discontinued (although apparently they have an alternative).
Yahoo Sports has some of the best NBA and NHL writers in the business.