WARNING! This device has major heating issues, as reported by all owners, for instance, here :
http://plugcomputer.org/plugforum/index.php?topic=1735.0
Even when idle, the guruplug quickly become untouchable (more than 70-80 °C on external metal parts) and owners report early failures after 1-3 months. The power supplies have been replaced in recent boxes (including mine) but the fault is the global thermal design, consisting in gathering all the heat from the CPU, RAM and Ethernet chip on a small alumnium plate which has no contact with air nor outside, as is visible here :
http://1wt.eu/articles/guruplug-slow-heater/
Also, the board inside indicates "SheevaPlug 2L", which means that not much has changed.
Also the build quality is very disappointing, especially the wires which break that easily. And I'm not even speaking about the buggy build of the U-Boot bootloader which, when fixed, won't boot the original kernel anymore :-/ The whole thing was made by amateurs.
I've read that GlobalScale (who builds them for Marvell) has announced a major redesign with an external PSU. I hope they will at least use the free space to put a huge heatsink and very large openings in the case.
What I also find very dishonnest from the vendor is that they constantly claim that there is a huge demand, explaining the delays, while they're in fact redesigning it to try to fix their mistakes. For mine which I bought via NewIT (nice team BTW), they were telling us that the iceland volcano was delaying shipping while they were re-opening the boxes to replace the PSUs. That way they could gain one month without officially reporting the issue.
Mine was meant to replace an old NSLU2 server, and given the huge heat and big risk of fire when I'm not here, it's only a useless brick right now :-(
Willy