Just saw this... Go get em!!
things are looking good - though we aren't working on cudaminer, but rather a fresh fork from the heavycoin cpuminer due to LOTS of stratum implementation differences.
We found nothing in the heavy1 hash function to effectively thwart GPU mining. A few 4-fold divergent code paths are laughable. A minor speed bump at best. Divergent recursive function calls would have been effective - but we found none.
Memory intensive algorithms such as high N factor scrypt seems much more effective at achieving the goal of limiting the GPU advantage.
This coin will be GPU mineable in no time.
Christian