> For an upcoming project I am investigating serial buses.
> What I have covered so far are RS485, I2C and CAN.
> Right now I am looking on Ethernet and USB.
>
>   Questions:
>
> 1) Anybody got a pointer to where to learn about ethernet protocol and
bus?
Why not try altavista or hotbot? You'll find plenty information!

> 2) Are there more buses I like theese above?
Yes, an awfull lot, including variants of the above.

Get a copy of A.Tannebaums book on networks!

regards,
Wouter.