I'm in the same boat as rejectkid. I mined my protoshares for a few dollars worth of electricity on my personal computers which are already running 24/7. Your proposed system will reprice your shares based on input cost. You don't want this. $6/288PTS = $0.02/PTS or 0.00002BTC. I'm sure you PTS price will tank even lower. I noticed it's dropped 20% on bter since I went to bed last night already. Please give up on this idea!
The deal you got was because initial difficulty was too low. Now mining only pays back 2x input costs. You got a windfall that is no longer a possibility.
The question that must be asked is this... aside from your 'good will' what value does your windfall provide to the future of PTS.
What if we had an alternative that would pay you for your good will by having you do something more productive for the cause than burning electricity?
With the current mining pool infrastructure with PTS, it is already effectively centralized with 3 players signing most of the blocks.