The lecture given during August Penguin 2012 by Shachar Shemesh about the life cycle and eventual closing of business of Lingnu is now online (in Hebrew). The slides (in PDF format) are available here, and the YouTube video is here.
On a personal note, I hope that the, mostly wonderful, experience of starting a business will yield some insight, and will help others.
Shachar Shemesh
Former CEO of Lingnu Open Source Consulting Ltd.