Hi troykm, as you don't have a Mobipocket PID on your ECO Reader, you can't set it up to synch automatically with Mobipocket Reader.
As you've found, though, it's easy to send feeds to an SD card, but you can also send feeds directly to your ECO Reader, in the same way. (Right click on the feed, select send Enews to... Removable Disk.) You'll find your new feeds in the eBooks folder.
We have no plans to add Mobipocket DRM support to our ECO Readers, as we're concentrating on Adobe DE support.
Amazon owns Mobipocket and it's Amazon's decision that we can't have Mobipocket DRM on an e-Ink device that has any other DRM (like Adobe).
Usual disclaimer: I work for DA Direct
