By Frankie Taddeo Bets and analysis for Week 8 of the USFL, plus updated future odds. USFL fans only have three weeks left of the regular season, allowing bettors a more focused look at the clubs that will most likely advance to the playoffs. After earning victories this past week, Birmingham and New Jersey clinched two of the four potential playoff spots. Through seven weeks of action on the gridiron, we still only have one undefeated team (Birmingham) accompanied by three teams above the .500 mark (New Jersey, New Orleans and Philadelphia). Bettors find favorites holding the edge overall, po…