A quick note to let people know we've posted a page describing the steps for enabling IntelliGantt Plus to create workspaces based on custom SharePoint templates.
Feedback is of course welcome. We're trying to tame the SharePoint complexity beast as best we can with a simple, understandable set of instructions. If you run in to any problems or have any pointers to make things even easier, please don't hesitate to let us know.
We've received a very enthusiastic response to this feature and look forward to hearing how you use it.