Why aren't more pools merged mining I0C/IXC/DVC? Is it difficult to configure pool software to mine multiple alt-chains? Is the slight additional computational cost not worth it?
mmpool is still merge mining them. I'd planned to stop I0C as the number of stales and orphans made it non breakeven for the PPS pool. Currently it's still going but at a much reduced PPS rate to break even. The i0coin daemon is also using over a gig of memory and the frequent block rate results in a performance hit when merge mining since a new bitcoin block is created internally for mining when the aux changes have a new block.