I'v also just finished a python script to trigger the donate to miners as detailed on https://en.bitcoin.it/wiki/P2Pool#Donating_to_P2Pool_miners

I don't have bitcoin to test this with but if anyone's willing to give it a go the details are below. The BTC addresses are assigned to different accounts and a cron job monitors their balance. When it is at or above 0.005 it will trigger the sendmany command and payout to 0.0001. Any remaining balance is allocated at random (see the wiki).

Donate to the pool

If you would like to support the miners currently active in either pool please send a BTC donation to one of the addresses below. Your donation will be distributed fairly amongst the miners within that pool, using the payment method detailed on the wiki.

P2Pool\P2Pool - 1KvL1pzHzkF6HR2BwoBi12UQUg7N1GtDYV
P2Pool\Jtoomim - 1AZ5VJkgsTtvUMYQZ3JRGLRZ6VxqsrcPVw

I appreciate that this is a feature that may not be used all that much these days. I just thought this may make it more accessible for those who don't run a p2pool node.

James.