Thanks for making this available, very cool. To help the network I have 3 public nodes running:

EU (AMS):
http://eu.poolx.org:9421/

US-East (NYC):
http://us-east.poolx.org:9421/

US-West (SFO):
http://us-west.poolx.org:9421/

They are all 0% fee for Karmacoin (KARM). Full disclosure: those servers are also hosting p2pool nodes for Leafcoin (LEAF), Kittehcoin (MEOW), and Mooncoin (MOON) and those instances have a 1% fee currently. I may change that in the future, but plan to keep Karmacoin (KARM) at 0% fee permanently.

Remember, you can always verify the fee that a p2pool node is collecting by looking at the /fee url. So for example, http://eu.poolx.org:9421/fee reports 0.0 indicating no fee is collected.

Also, be sure to upgrade your wallet to v0.8.6.2.4 ASAP--this is a mandatory upgrade that must be done before 10AM EST Monday February 24 which is tomorrow. See https://bitcointalk.org/index.php?topic=447657 for details.