While the bidding fracas over Hulu begins to take on the dimensions of an all-out war, it appears that the brand’s suitors are unwilling to pay anywhere near its $2 billion valuation. Yahoo this weekend announced it would throw its hat into the ring, and the reported bid (between $600 million and $800 million) is the largest that has been leaked thus far. Trouble is, it only accounts for between 30 to 40 percent of Hulu’s year-ago value. Marissa Mayer’s gambit comes on the heels of Yahoo’s $1.1 billion investment in the revenue-challenged microblogging site Tumblr....