there is new p2pool commit at which will maybe help separating nodes running on forked chain (changed IDENTIFIER and PREFIX)
so p2pool owners please try to update
about multipools - they will always have the hashrate advantage no matter KGW (at least transactions are not stuck for hours now..)
Great, just updated my node
http://lovok.no-ip.com:9566 to this last commit. Hope that others will follow ...