BBC Pi Project

So, this is a personal challenge, but I want some information
On the BBC there are several interface connections:

Printer User Input/Output 1MHz Extension Bus RS423 Disc Interface

There are a few others, but they wouldn't help here.

Initially I am looking for helpful resources, Datasheets, Connection documentation (between BBC and Pi), Tutorials, and any other information that will point me in the right direction

Sure, there are ethernet interfaces out there, I particularly like this one from Cyberspace

What OS would be best to use ?
(Cosider that i may need direct help, so having someone be able to remote in would be an advantage)

Can I use HDMI and AV out at the same time ?
(this would help during a hangout discussion, or for livestreaming)

User Interface

423 Interface

Description of The Tube

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