SIX Viewer has Best Available Image Layer

A colleague pointed out to me that the Best Available Raster as a Web Service, that I was looking at options for a while ago, appeared to have been already implemented by the NSW Department of Lands in its Spatial Information eXchange (SIX) Viewer. At first I was unsure whether what was being displayed came from a pre-cooked image, or was being produced "on-the-fly", but during the week I sat with its developers at a conference dinner, and they assured me that the image was being produced on-the-fly from around 300 images using the Image Web Server from ERDAS under its hood. This was one of the three candidate technologies that I thought most likely to have the functionality that I was looking for earlier this year.