Yes it's enabled and I pay PPS 0.0000276244891911 in bitcoins (BTC) 0.0004962679032267 in namecoins (NMC).
Zero fee for now.
As far as I know I'm the one one with PPS. My system is bet different than what your are use to but you will get the hang of it. PPS is paid when a block is found and shares reset to zero when a block is found.
Do you have a proportional option as well?
edit; forgive my poor mth skills but with zero fees wouldn't it be .000029797456? or was that 00002797456? hehe, think last time I punched it in calc the difficulty was different. ;p
You are right there is a 6.66% fee on PPS.