P2Pool scanner is updated and now shows more info on all the public P2Pool nodes.
The node with the least latency should normally give you the best hashes per seconds results mining.
p2pool-scanner: http://95.85.49.119:25499/If you can't decide which one to pick... pick my node which is based in Amsterdam
Just replace my wallet address in the command below with yours and start mining
cgminer -o http://95.85.49.119:25490 -u Sct12qX6fSFarGNbPteTKaiFjkgfpjnSAP -p x