Moments ago boxing promoter Bob Arum informed Boxingtalk that Top Rank's $8M offer to Floyd Mayweather for an Antonio Margarito fight is now on the table for November 4, Floyd's preferred date.  Arum, who is also promoting the Manny Pacquiao-Erik Morales rubbermatch on November 18, doesn't believe one date would hinder the other's success since both fights "cater to different audiences, and if it happens, Mayweather-Margarito is one of the most significant fights in boxing." There will be much more to follow in the coming days, stay tuned to our front page for all the latest. REMEMBER WHERE YOU HEARD IT FIRST! (9:50 PM EST)