Where can i get the diamond kernel miner? sph-sgminer doesn't seem to have it and groestl doesn't seem to work :/
Try updating your sph-sgminer. I had a slightly out of date version but was still mining DMD on it.
https://bitcointalk.org/index.php?topic=475795I downloaded that again, but it doesn't have the "diamond" kernel in it
When it solves a block, I'm finding this in my wallet debug.log
05/30/14 21:16:15 ThreadRPCServer method=submitblock
05/30/14 21:16:15 pindexBest = 411073pindexBest = 411073ERROR: CheckBlock() : hashMerkleRoot mismatch
05/30/14 21:16:15 ERROR: ProcessBlock() : CheckBlock FAILED
When you run sph-sgminer you need to specify the kernel as "groestlcoin". That should work unless something has changed with the coin since I last mined it a couple weeks back.
Waiting for wallet to sync up now so I can confirm it for you...
EDIT: Still works. Just picked off another solo block

Yes I can solo that way, but pool mining doesn't seem to work at all. In previous posts, there are reports of a "diamond" kernel fixing things. I believe this is the source, just need a windows binary :/ https://github.com/danbi/sph-sgminer