vsystechIt works for own p2pool nodes, but there is no support for cooperative mining nodes yet. The fix is quite simple, but actually, we prefer the network of many "small" p2pool nodes instead of the big one.
Anyway, it seems that we have no choice, because some users already need it.

So, new p2pool version will be published as soon as work under StratumServer will be completed.
Changes list announce:
- Shares difficulty selection, by using difficulty ratio as password;
- New blocks version schema support;
- Cooperative mining nodes support.
How is NovaCoin PoS different from PPCoin?
(sorry, but I generally find so little info on both PoS)
Actually, there are not so many differences. The main differences are dynamic ROI calculation and another entropy bit source.