> As you can see, it identifies the hardware addresses as the same for
> both these cards. 
This is the normal case for multi-homed sun systems.  the ethernet
address is on the motherboard, not on the card.

> This does cause a bit of a problem. 

Are you plugging both ethernets into the same subnet?  if not, it
shouldn't cause a problem..

> Anyway, is this a software issue or are my ethernet adapters
> throughly fuct?

this is what sun hardware does by default.
	
					- Bill