I uploaded installers for BlockAnalyst to the Sourceforge download page. Check the BlockAnalyst project page for a link.
The PCRaster team is at the European Geosciences Union, 2012, Vienna. We will give a demo at session HS3.3 Wednesday 25 April, 17:30–19:00, Hall A, Poster A 118. Info at http://meetingorganizer.copernicus.org/EGU2012/poster_programme/10307.