"I'm very interested in Piwik, .... But, the big thing holding us back now is pronouncing the name. Can you give me guidance?"
We should have a MP3 for download "How to pronunce Piwik?"
created a small mp3 on: http://www.pebosi.net/200903/wie-spricht-man-piwik-aus
My preference is emphasis on the first syllable with a long 'i' sound (as in pi, ).
Created a new version: