yes these two are promising. cryptonote is having an overly complicated CPU implementation
and is *very* memory hard with lots of random access. This limits your GPU advantage to maybe
factor 3-4 over CPUs.

wild keccak is interesting also, and it also has a memory hard component with a random scratchpad that grows with time. The advantage over CPUs is more significant, especially because that scratchpad is currently quite small (~5MB)

The weak point of these crypto currencies is a lack of simple to use windows installers with GUI wallets. This technology is for geeks only at this point.

Christian