Can't wait to see what it looks like after you're finished. I will be looking on ebay tonight for a Rev A/B iMac G5. I just hope I can find one for a reasonable price, but I'm sure it won't be too much trouble to find one. I think my mom will like this much better than the mini and the cables being everywhere.
Are you going to be using a BT keyboard/mouse for it? I'm not sure which would be better, however, the least amount of wires the better.
check out the first pics at the top of this thread...
it came with BT keyboard and mouse! score. even had batteries in them