SJTAG.org provides a variety of online tools to aid collaboration outside of conference calls and to provide a capability for non-members to participate:
We run online discussion forums at http://forums.sjtag.org/. Registration is open to non-members but all new accounts must be activated by an administrator before you can contribute - this will normally happen within a few hours.
For collaborative writing and publication we have our wiki at http://wiki.sjtag.org/. Registration is open to non-members but all new accounts must be assigned "Editor" rights by an administrator before you can create or edit articles - this will normally happen within a few hours.
Many of our documents and supporting files are made available for download through our File Manager. Only members can upload and manage files stored in the file manager, but non-members can browse the files on our Stored Documents page. Members access is at http://files.sjtag.org/.