Were I to take on Yahoo, I'd turn it into a content powerhouse, with supporting tools. Yahoo! Finance should have the best articles -- very technical yet explanatory -- all supported by their stock tools. A billion ways to monetize that.
I would use Yahoo! Sports to seriously go after ESPN, which is turning into a turdpile of garbage that's worse than TMZ. I'd literally troll them and get some extremely technical content as well as the fun stuff. Monetize with fantasy, tickets, live stream, schwag, etc.
Rinse and repeat with other news sectors. I'd find about a dozen niches and build out some aggregators with trending stuff - basically DrudgeReport style aggregators for each niche - awesome headlines and all.
Eventually, steer some content towards consumer facing products, and build out a shopping engine for the ones that are consumer-related.
Would this be the next Facebook or Google? No. But it'd be profitable as hell and with the right no-holds-barred content team in each niche, it'd once again become intertwined with American culture. It would "never" die, and it'd be a true fighter for the first amendment.
I don't deal with apps so I'd hire one of you guys to be my #2 for that side of the game.
Buffett and Gilbert you know who to call when you want this company to become relevant again.