My SheevaPlug just died on me a couple of hours ago, dead PSU symptoms. After a little bit of reading on the forum I found this post, and I was like
WTH? So I tried it, and it's WORKING! The PSU is not completely dead after all. I'm writing this through my SheevaPlug (as it is used as a router at home), powered through USB connected to a powered-off desktop computer. Yay!
I've sent an email to Jason with this, I hope my plug has warranty, I bought it January 15, 2010 from NewIT and I live in Romania, which should be in Europe
(=2 years warranty?)