Hi Chris,
sorry for that late answer, but remember that we run this limbomedia projekt in our free time and cannot answer every request in time ;)
To your problem:
We didn't test limbomedia on a pogoplug but unfortunately you're right with switching to another media center.
Such errors like yours usually appear on "low-end" hardware when there's not enough memory available. Afaik the pogoplug comes with 256mb which is simply not enough for OS + limbomedia.
LimboMedia is build with the focus on high performance, stability and a large amount of media data/files. Therefor we do a lot of caching, connection pooling, multithreading, etc. which simply requires a good base stack of memory. The benefit is that memory consumption doesn't increase much at runtime, per user and with load, which is way more important to us than running a system which is lightweight in idle.
Hope you'll find a proper solution for your hardware and maybe come back if hardware requirements fit ;)
Personally i'd always prefer a native lightweight (C/C++) solution on low-end hardware instead of software written in Java/.net/Php/python VirtualMachine or Interpreter language.
Best regards
Thomas