Filed under: Deals, Rumors, Competitive strategy, Google (GOOG), Yahoo! (YHOO)Here it is, right in front of you, the opportunity of a lifetime for Yahoo! Inc. (NASDAQ: YHOO). With the Rivals.com deal now in hand, making Yahoo a larger internet sports media interest than ESPN, the iron is hot and ready to strike a working partnership between Yahoo! and ESPN. If the two entities can hammer something out that makes full use of each companies strengths, we would most probably witness the birth of an internet sports composite that Google (NASDAQ: GOOG) couldn't touch. Wouldn't it be nice to see Yahoo! as the undeniable leader in something? Admit it to yourself, Yahoo! deserves it.I have no idea if there have been corporate discussions regarding such a working partnership, but ...