Hey Craig,

Sorry I wasn't able to reply to your emaul yesterday.

Also, sorry to hear about the shipping issues. I know those very well.

Answers to your questions are as follows:

With a 4870 use the Apple Duallink DVI to mini display port adaptor. You wouldn't think so but I have seen issues running HD on the regular adaptors that went away on the Dual Link Adaptors.

Do not use the mini display port TH2G boxes. Use the TH2G Digital and connect it to the DVI on the 4870. You can connect the TH2G to the Adaptor but it's a total pain in the ass to get working and not something I would trust on a show were rebooting might be necessary.

This works with Snow Leopard for me. Make sure to download the Matrox Desktop application to configured your display. I have run 4x 1280x720, 4x 1280x1024, 4x 1024x768, and 6x 800x600 on the 4870 with TH2G-D boxes using snow.

Yes, the sleds are longer, yes this is screwed up because I swap drives between computers all the time. What Nev recommends is the same thing I do.