I had the presentation last week tuesday, went really well!!!
all I did was connect the mobo and PSU up (not cpu/ram or anything like that) and then got a wire and just created the circuit where the two little metal teeth come out to start the PC.
to wwih90 - you need the PSU connected to the mobo to start it up.
here is what my project looks like: http://www.flickr.com/photos/45889788@N05/