Author is a bit misinformed
Symantec already has a couple of appliances, has had them for a few months. A NetBackup 5000 and a NetBackup 5200. The 5000 has been out for months. The 5000 is a PureDisk Dedupe box, supporting up to 16TB of deduped data, and the 5200 is a Netbackup media server supporting up to 32TB of deduped data. Bot are fully populated, xeon powered boxes with lots of SATA based disk, and RAM in a rack mount box.