I don't have different DAW, but often I put Fruity on the laptop with FxTeleport as VSTi from the DAW, where the main sequencer and SFP is. So we can sequence together or play on both machines.
FxTeleport is a bit tricky to set up, you have to do it right and it still can bounce. In full compliance with Murphy's Law it always crashed the machines when fellow Flexor testers were here
We had some sessions with laptop with Magma expansion and SFP, and another laptop with an RME. We set up a small MIDI, ADAT and SP/DIF network.
We used one sequencer PC (b0rg's RME box), and put a recorded Ramp (see flexor) on an audio track in Ableton Live. The ramp and audio tracks were sent to the other machines, could pass on audio as we wanted. Ramps control Flexor sequencers in the synths and make modulation signals etc, on different machines and all synced by the ramp from the main sequencer

It's dead easy to setup something similar if you have the machines.
Synchronizing native sequencers is a lot more complicated, unless you have VST-Link. If it does what it says it should be awesome. One disadvantage: it is only supported by Steinberg. SX or SX2 on the main machine to controls VST5 on one or SX or V-STack on a number of other machines.
It uses one digital audio channel to sync and control the whole lot.
All machines (pc and mac) will add processing power, and latencies from different machines add to the overall 'audio network' latency. SX2 has full latency compensation, so the mix should be tight!
There's a couple of power users around who got different machines, according to the
Creamware User Setups topic.
<font size=-1>[ This Message was edited by: at0mic on 2004-01-15 04:06 ]</font>