p2pool works another way than traditional pools, one basic fact must be taken into account to determine on which p2pool network to mine, larger (higher global hashrate) p2pool network results in higher (share) difficulty for miners thus it's harder to get work accepted and being paid. For this reason, it's better to split p2pool into more smaller networks. There are currently three:
1st - https://p2pool.vertcoin.org or http://lovok.no-ip.com:81 (for miners with more than 3MHs)
2nd - http://p2pscanner.no-ip.org or http://lovok.no-ip.com:82 (for miners with 1,5MHs - 3MHs)
3rd - http://lovok.no-ip.com (for miners with less than 1,5MHs)