This is a really exciting feature. I'd love to see some figures on performance too. Maybe i'll just have to give it a go :)

Just don't have a power outage without a UPS, it'll scramble your entire dedup volume.  Microsoft's answer seems to be "don't run dedup unless you're in a clustered environment" meaning another server with the same copy of the data "just in case".  Nice try.  They shouldn't be bragging about a feature that isn't even trustworthy.  Learned this the hard way just after deploying a file server.