my little input so far,
Reset and power buttons on the mobo - dfi lanparty
Optical SATA drives - already sold but buggy and only work on a few mobos
Clear CMOS buttons - starting to be introduced but shouldnt have to ever do that
Sharp edges to be rounded - what sharp edges? go buy a decent case tbh
Universal clip for all cpus and heatsinks - will never happen intel dont like amd and vice vesa and with the new sockets...
All motherboards having a standard 'plug' for the front panel header - agreed
Retail dust filter that works 100% - agreed
3 or 4 sys_fan connectors - again dfi lanparty
A couple of plastic stand offs - dont realy see the need
A translucent motherboard, maybe with embedded LEDs - gimmic, cant be done anyway
Not having the front panel audio headers on the back of the motherboard! - agreed (near the I/O panel)
Cables that are easier to bend - you need to buy akasa cables
Colour coded mobo and cables - gigabyte do this but it looks naff
Good motherboard layout(placement of connectors and stuff) - very hard to do with dual graphics and so many ports, i recon e-atx needs to be moved to with so many onboard things but the dfi expert imo is bang on
Secure SATA plugs - never had the need for them, dfi cables and headers are quite hard to pull out of the socket.