Mark

Can you show me an open source NAS that supports that magic RAID stuff across multiple different size drives ala Drobo, X-RAID etc that the commercial solutions have?

Sure underneath there's mostly open source but when I was looking at NASes, resizing/moving around partitions in a simple manner really wasn't possible without digging into the command line and working it out yourself.

Whilst open source may be 90% or more, it's that last 5 or 10% that makes a big difference. If it was really that trivial surely someone would have done it already.