HSA (Heterogeneous System Architecture) Related links
The HSA (Heterogeneous System Architecture) foundation is a consortium of companies with a goal of simplifying the task of programming parallel compute devices.
The HSAIL Programmer's Reference Manual version 0.95 is now public.
There is an open source HSAIL Simulator available.
hUMA (HSA Uniform Memory Architecture)
HSA compatible devices will allow coherent memory accesses between GPU and CPU cores. This promises to greatly simplify inter-op between devices. Here are some links to hUMA related articles/sites