One question and one response:
Question: Is it true that g70 can be used in sli with nv4x?
Response: The ATi SB is buggy, ATM. However, ULI makes rock solid stable chips, they just aren't as well known in US and EU as they are in Asia. DFI already has a lanparty xfire board which uses ATi NB and SB, so it is possible, just difficult, for whatever reason.
Question: Is it true that g70 can be used in sli with nv4x?
Response: The ATi SB is buggy, ATM. However, ULI makes rock solid stable chips, they just aren't as well known in US and EU as they are in Asia. DFI already has a lanparty xfire board which uses ATi NB and SB, so it is possible, just difficult, for whatever reason.