After looking back over the article I noticed the prices on these items. Guys these things are rip offs. For the same amount you can build your own Via based Mini-ITX server and run whatever features you want on it.
Via Nano L2200 1.6Ghz (or the newer dual core ones)
1~2GB of DDR2 RAM (4 if you want to be adventurous)
JetWay motherboard, or the Via reference one (I prefer Jetway)
80GB SATA HDD (for OS)
Then purchase a MediaSonic four bay eSATA / USB 3.0 external raid enclosure. Connect the enclosure to your server using eSATA and share out whatever drive setup you want. The bonus is you can do RAID-5 and the enclosure has its own circuitry to do the XOR calculations, thus relieving your CPU from having to do this. Use Linux as your OS, or MS SBS with
DiskCryptor (Truecrypt refuse's to support Via CPU's, DiskCryptor is a fork from the original TrueCrypt and supports all current HW encryptors). Now you get whatever you want out of this package, use it just for network resource sharing like printers and file shares. If you want you can add OpenVPN style support, OpenSSL now supports the padlock encryption engine and you can specify that inside the OpenVPN configuration. You can add your own DNS server, web server or whatever project you can dream up.
NAS devices like those above are for home "professionals" who don't know how to manage their own server, basically the iApple drones.