Sep 1st 2007 found some old notes from Sep 2nd 2003 in a stray folder when unpacking more boxes. Back then in Edinburgh I'd jotted down some ideas about access grid and potential uses of it including AG cafes 
and I forgot all about it!
Meantime, I had a chance to try out the AG node at the WASP, an interesting experience!
Came across a definition of HPC from ac3, an APAC partner in NSW