I might be sticking my head above the parapet on this one but personally I agree with Lance that it should be thrown out of court.
These brands benefited from Lance's misdemeanours even more than he did. Their reputation hasn't been damaged by his actions either as they didn't condone or encourage them (at least that's what we are lead to believe).
For instance I'm sure US Postal made back their sponsorship many times over during the Lance era and are not losing any business now due to it either.
I can see why competitors and team mates might have a case but not the sponsors. Let's assume Floyd Landis was clean for instance he could presumably have earned more if Lance wasn't cheating. Likewise FedEx might have a case as their competitor US Postal was benefiting from Lance's cheating. However IANAL so what do I know.