Great stuff. I wanted to try this but never came across a broken Wii. I think you're going about it in a much better way than I could have anyway. Can't wait to see you finish this.
Tried that already I think the card detection pin on the Wii SD card slot is recessed, which makes it near impossible to solder. I don't want to take it apart to solder to, incase I mess up the push-push spring. I might just order one of these: http://www.sparkfun.com/commerce/product_info.php?products_id=204
Been working on the rear I/O connections - got the USB ports, power and fan hooked up fine and am now working on the VGA connection, which is great fun, as you can see: For some reason the connections on pins 6 and 12 (which are usually both ground in the Wii, but I was using them for ground and V-Sync) weren't getting a signal, so I had to reposition them and add pins to the AV connector from another component cable. It now displays on my monitor, but with a ghosting effect. Anyone know what could be causing this?
I love the fact that you're using all the original ports and such. Hopefully you can get everything working properly; it'd be very cool.
Sorted the VGA issues and made a bit of progress. Completed the rear I/O ports and almost done on the front ones - just have the niggling SD reader to finish. Power, VGA, audio and sensor bar: USB: I/O stuff in place: With motherboard:
http://www.bcmcom.com/bcm_product_NX530Z.htm Such a pain ordering it though. After ridiculous UPS fees, bank fees and customs, one of these would have worked out about £30 cheaper: http://www.portwell.com/products/detail.asp?CUSTCHAR1=NANO-8044
Long time since I've updated this, but it's definitely on the backburner for the timebeing. I decided that the motherboard just wasn't powerful enough and still had some minor issues with the VGA signal. Hopefully something in a Core 2 Duo configuration that I can afford will come along before too long.