There is a rather old article on computerworld website. The article talks about what it calls the recent "scramble" to create application stacks for enterprises using open source components. The criticism is that the market does not really exist but is a rather hyped up buzzword. One tends to draw subtle parallels with push technology of the heady dotcom days in one's mind. The technology existed, but it was trying to solve a problem that did not exist.
Open source stack vendors seems to be in a similar situation, developing solutions in search of a problem. When will this hype cycle burst ?