Since my last post touched on this open source service provider as a viable business model, I might as well find and list a couple of prominent companies in this space.
SpikeSource – Business-Ready Open Source Infrastructure has a celebrity CEO Kim Polese.
SourceLabs | Dependable Open Source Systems is in the business of providing no-charge, certified stacks of Open Source infrastructure software, and charging for service.
OpSource – The Software as a Service (SaaS) Experts is in the OSS for SaaS areana.