SheevaPlus is not made by Marvell
The page #2 about the SheevaPlug is highly misleading.
First of all, it is a company called GlobalScale Technologies Inc that manufactures the SheevaPlug (amongst other so-called Plug Computers). Marvell only produces the ARM-based System-on-Chip (SoC) that runs at his heart, with some technologies they bought from Intel a while ago.
Having said that, I really discourage anybody from buying any GlobalScale device (SheevaPlug, GuruPlug, DreamPlug).
They are a company based in Shenzen (China) that pays little attention to quality, which is quite disturbing if you consider that Plugs are meant to be used as servers (=high reliability) active 24h hours a day in constrained space.
Would you like a NAS with a 30 days warranty (including shipment from China)? One that fails randomly in warm days? Maybe corrupting your backup data? Or even catching fire and burning down your house? All the above with broken WiFi drivers and other similar goodies?
If you do, GlobalScale products are for you ! If not, your money deserves other other vendors. Read for instance about the GuruPlug Server Plus:
The original version will overheat and freeze/reboot even the CPU is idle. GlobalScale eventually provided angry customers with a "Professional Upgrade Kit": a small fan and some glue, with the result of 1) not really fixing the problem 2) making the Plug noisier than a hair dryer.
In other words, a server you cannot rely on that defeats the whole purpose of using low-power CPU. :-(((