I need to get back into the blogging groove since returning from PyCon (not to mention writing about PyCon...), and you'd think this post by Dave Tosh, entitled "Open source - only in an ideal world" would be enough to get my juices flowing, but Stephen covered it pretty comprehensively, and Dave's petulant response ("Downes’ post borders on slanderous") only makes him sound worse.
I've never quite gotten a feel for where Dave & Co. were going with elgg, and I don't understand what their business model is/was supposed to be, so I can't really criticize it in detail. It has always seemed to me that they were too interested in proposing a specific alternative model for education to suit the market of existing K-12 schools very well, but I assume they already knew that. I don't presume to know the first thing about selling software or services to universities or businesses. I do know that there are lots of Zope and Plone shops selling open source based services to universities such as Infrae in Rotterdam.