Why no mention of FalconStor?
FalconStor has the reputation as the industry's fastest enterprise VTL/Dedupe. Combined with the fact that you can put it on top of any one else's storage (whereas Data Domain's enterprise solution is NOT a gateway and you are stuck with their junk disk) why wouldn't they be apart of the conversation? EMC uses a pared down version of FalconStor's VTL.