I see that the Gigabit and Digital Audio power pinouts are exactly the same. I succeeded in booting my DA from an ATX PS with an extension cable made for P4 logic boards. It had sufficient extra pins for the job.
If you're bus clocking, a packet of self-adhesive RAM heatsinks to lob onto any suspiciously warm ICs might be a good investment.

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Indeed, although i'm not sure how the RAM will respond as it will be clocked up to a theoretical maximum of 133mhz, and the RAM itself is already 133mhz. Better to be safe than sorry though, so i'll keep RAM heatsinks in mind when I next head in to the supplier.

Also, cheers for the link to the power supply pinouts. I forgot the link a while back and had been looking for it ever since.

Anyway, quick update. The board has been paid in full to the supplier and should be shipped down next week. I've also picked up a Belkin 3 Port Hi-Speed USB 2.0 card, designed for Mac (as it says on the box) so this should give the system a kick in terms of connectivity.

USB 2.0 card set me back $40, a little more than I had expected but it comes with a lifetime warranty and is quite a good card overall. Plus the assurance it works with Apple PowerPC logic boards is a big plus.