Would you care to update your list of resources with this? http://www.overclock.net/t/1353863/ssi-specification-info-for-everyone#post_19502685
I tried to help out and get someone to sticky it, but everyone ignored my thread. So maybe it will be of more use here.
EDIT: As suggested, here is the link directly to the pdf.SSI Specifications
Also, just an FYI for everyone, the SSI EEB mounting holes support mini-ITX, micro-ATX, ATX, E-ATX, SSI-TEB, SSI-CEB sizesEdited by brandon88tube - 6/15/13 at 6:34pm