Research before publishing
" Instead of seeing these software products backup data to deduplicating appliances, such as those from EMC, Data Domain or Dell's DL2000 CommVault Simpana box, ..."
Ahh Commvault has been doing this with the implemenation of 8.0. The DL2000 box is simply a prepackaged solution of a server with storage, which uses CommVaults Dedup engine. The others referenced are Hardware Solutions.
If readers want a true discription of what the author is trying to talking about go to Commvault.com