For the impatient, here is HVC cgminer version that works on 1gh: https://github.com/reorder/cgminer_skein

It currently only works with GCN cards (or so I believe). No binaries are available as it is a WIP, and I will not provide support for this version.

Please configure with './autogen.sh --enable-heavy --enable-opencl' and run with '--heavy --vote 1024' (or your preferred vote). Best intensity setting seems to be 3 for all cards, but you may have luck with higher values.