http://www.gartner.com/DisplayDocument?id=506205

Red Hat Exchange will help IT planners add a level of due diligence and single-level responsibility to open-source selection.

i figured i'd toss our name in the hat as long as you're mentioning technologies that make Open Source server apps more accessible. We've had more substantial traffic than RHX it sounds but to be fair, we've been doing for a year... We do the same concept as SpikeSource of bundling pre-configured certified stacks only we're focused on superior usability and delivering end-to-end OSS apps in a vessel that removes the pain of setup and maintenance. We currently have 9 JumpBox applications available. Check it out-> http://www.JumpBox.com

sean