Is it RAID configurable? Is the data encrypted at rest, and, if so, how? Will it support two factor authentication? Will Plug ever "phone home" for any reason or report any data (meta or otherwise) to anybody except the purchaser? Will the software be open source, and if not how do we trust this device from a security standpoint? Can Plug be used effectively as a NAS without the syncing software?

I know it's difficult to tell, but I'm very excited about this.