I did have another shot of a working PCI Express motherboard but I filed it somewhere safe (mutter). Anyway, here's another I found at PC Watch (japanese) :
Notice the the CPU's at the front. Sadly I can't read Japanese but unless I'll mistaken you are looking at an early Grantsdale board with a Tejas (P6 ?) chip. If you can read Japanese, here's the original story It looks like its from the Intel IDF last september (2002)
Apparently the conceptual board is for AMD Athlon 64 processors and supports for DDR-II memory and PCI Express. I'll give a brief overview, but use the link for a full run-down. XBit really are good
The videocard is believed to be a PCI Express x16 port based on ATI's RV380/RV381 VPU
Added to this are three standard PCI slots and two 1x PCI Express
There looks to remain support for "the old" IDE devices too
Read the Xbit Labs review for a fuller picture though.