I have to agree with Lambchop here.

That being said, if two mining companies at 10 + 1% respectively are mining on P2Pool, and then a large chunk of the network joins in... that would be good.

What I think is missing that the moment though is a proxy into P2Pool, so instead of a simple node that pays out directly to your address, one that accepts the payment itself and breaks up PoW to its users so that smaller miners can enjoy P2Pool, without waiting a month for a single share.