Pivot
Not having gone to SIGIR 2010, I missed Gary Flake’s keynote address, in which he described and demonstrated Microsoft Pivot, a zoomable, faceted search interface that his group built. Jeff Dalton has a good summary of the talk, which parallels Gary’s previous presentations, including a TED talk (video below). The demos are pretty slick, and the scale at which the system operates is impressive.
In some ways, his emphasis on rich clients and interactive control over large, pre-computed datasets, is a great illustration of HCIR principles. The user is encouraged to explore by making fluid, immediate, reversible operations over large data sets with the goal of finding useful information.