There's no reason you need to use the digital mixer if you don't want to, JWL.
Are you worried about sync when you connect the two Macs by lightpipe? The simplest way to do it is just to run a word clock connection between the two MOTU boxes.
I've been using MIDI Over LAN since I have Macs and PCs, but Network MIDI works absolutely fine.
While I don't have a PCI-424 card in my second G5 yet - I'm using the Mac's built-in TOSlink output converted to wired S/PDIF in both directions as a temporary solution - I have one on my main G5. It works really well, and I haven't missed my Panasonic DA7 digital mixer since I sold it a couple of years ago. I was worried about not being able to grab faders to adjust levels, but it's pretty much set-and-forget in the CueMix Console program.
Are you worried about sync when you connect the two Macs by lightpipe? The simplest way to do it is just to run a word clock connection between the two MOTU boxes.
I've been using MIDI Over LAN since I have Macs and PCs, but Network MIDI works absolutely fine.
While I don't have a PCI-424 card in my second G5 yet - I'm using the Mac's built-in TOSlink output converted to wired S/PDIF in both directions as a temporary solution - I have one on my main G5. It works really well, and I haven't missed my Panasonic DA7 digital mixer since I sold it a couple of years ago. I was worried about not being able to grab faders to adjust levels, but it's pretty much set-and-forget in the CueMix Console program.