As someone else has probably already suggested, the drivers for the on-board sound and Ethernet are just not finished yet.
I suppose it could be a botched motherboard design and they don't work, but I think that is unlikely. Drivers take time and effort to write and manpower is limited, so I would not panic yet.
On Amiga Future #91, page 16, an article by Trevor D. says: "Several changes in the Nemo 2 design meant that certain features no longer worked (e.g. onboard networking, etc.)"
So something changed and as I understand it, some drivers need to be reworked. Hopefully it won't be too long before the proper drivers are ready (for those who can afford it, that is)
