How exactly would the "pool" get paid? All of the coins from the block go to whoever finds it. If you take coins from that person, it just becomes another pool.
Come off it! How does this solo pool get paid? If you find the block, then you get 99.95% of the 25 BTC it is worth, the rest to the pool.
In the same breath I'd add, the "normal" pool mining would say incur a flat rate for paying out to your address (not rocket science, but the pool gets paid then!)
But I digress, the question was is that kind of pool technically feasible to implement (or am I barking mad because that is what P2Pool is)?