As eGO's resident boxing expert it will be this generations' Hagler vs Leonard. Do not let those crazy MMA fans tell you "Boxing is dying" it is not dying sports do not have 2.4 buys and 1.4 buys. But the fight has a lot of intrige going for it, you have Mayweather's slick defensive abilities and Pac's uncanny chin (many hardcore boxing fans thought Pacquiao would have been murdered by Cotto). Then you also have to play into the personal intrigue with the fight. Mayweather will talk a lot of trash (he has begun already look it up, it's not appripriate for the forums) and Manny's humbleness will be an enduring factor that charms many fans.
Finally the rumor is that the fight will take place spring 2010 in Yankees Stadium so cheers that's my two cents on the fight.