Hi Chris,
Although the vast majority of the content was beyond me, I'd personally recommend reading the archives of the mailing list (http://www.earth.li/pipermail/e3-hacking/) from March and April 2004 and possibly beyond, if you have not already done so. Sounds like it would not be so much beyond you ;) The posts shed a lot of light on what I thought I was discovering for the first time, includes the first mentions of running code on the E3, and also I think it is mentioned how they do ethernet at Amstrad (some USB adaptor AFAIR)
I've got to trawl through May and beyond before I start trying to contribute to the list again!
As an aside (and shoot me down if it is mentioned in the later archives ;) if anyone has any suggestions of what I should plonk on the other side of a PBX to talk to the E3, could you give me a quick point in the right direction? I got a lot of asterisk to do in the next couple of weeks and if I can cover that bit at the same time it would be nice.
Cheers, James
As I mentioned before, my linux knowledge is pretty poor, but I feel sure that I can get to grips with it pretty quick, so I ask again if anyone has any good material to start reading from?