So I had some free time and was playing with p2pool.
So here is a list of active P2Pool nodes:
http://pool.nitro.gr/pools.phpAnd here is a list on the map:
http://pool.nitro.gr/nodesmap.phpData are updated every hour. At midnight a new scan occurs for new nodes and offline nodes are deleted from the database.
I know I'm no graphics artist - but hey it does the job

Very cool, I'm surprised there are no nodes in South America (and Africa), I expect as Brazil begins to see some adoption they will begin to pop up..