Joseph and Clarise have published two of their three podcasts on Pentaho. If you are a developer considering Open Source BI you should definitely have a listen to the three podcasts. Why? Well, rather than sifting through web pages, design documents, etc to get the gist of Pentaho you can hear it from their top techies mouth. James Dixon (whom I’ve met) is sharp as all get out. Listen to James talk about the core of Pentaho, and the realities of bringing together more than 40 open source projects into a cohesive framework.

Both are about 15 minutes or so. Worthwhile to get the net net:
OSC Podcast Pentaho Overview
OSC Podcast Pentaho Overview Part 2