Just posted a simple 'Getting Started' document that explains the general concepts behind the IntelliGantt API and supports the accompanying sample application. Our goal is to make it very easy for system integrators to connect MS Project and WSS 3.0/MOSS 2007. For example, a hosting provider can easily add a feature that takes an MPP file and fleshes out a task list.
With this API, you will want to install IntelliGantt V4 on the same machine as the sample application. The sample application's reference paths assume you install IntelliGantt V4 into the default C:\Program Files directory.
Since you can now install IntelliGantt V4 on 64-bit machines as well, you may find the sample app doesn't find the references. This is because Windows 64-bit will append Program Files with a (x86). So you will want to update references in this case from:
C:\Program Files (x86)\TeamDirection\...
You can get the API and documentation from our forum here.