A new group specifically for PCI Express has been started at:
This group is NOT officially linked to the PCI-SIG (although they did send us their best wishes for this group, when I asked permission), but is designed to be an open forum for ANYONE involved with PCI Express from end users through to folks involved with defining the future specifications.
Feel free to drop by, join up and ask/answer some questions or just post your feelings about this pervasive protocol.
Hopefully, we can all learn something.
Please note: This group is NOT intended to be a black-market forum for illegal exchanges of the protocol or other Intellectual Property. The specifications can be ordered by non-members of the PCI-SIG by using the orderform ont he PCI-SIG website