My AMCIS 2009 paper on the Commercial Open Source Business Model will be republished in an LNBIP (Lecture Notes in Business Information Processing) issue by Springer-Verlag. The reference is:
Dirk Riehle. “The Commercial Open Source Business Model.” In Value Creation in e-Business Management, LNBIP 36. Edited by M.L. Nelson et al. Springer-Verlag, 2009. Page 18–30.
If you feel like it, you can acquire a commercial license by purchasing the paper download from Springer. Alternatively, you can use the community edition linked to above.