Toby Getsch was kind enough to lend his wisdom (and Microsoft SharePoint training) to set me straight on which SharePoint version is called what. I admit to being a little too loose with my references-- basically saying 'The SharePoint released in 2003' or 'The SharePoint released in 2007', which doesn't necessarily distinguish between the free one and the one you pay money for.
So to set the record straight, here is what I believe to be the correct references for SharePoint products:
1) Windows SharePoint Services (WSS). These are the core set of SharePoint services, and they are free! The versions TeamDirection IntelliGantt support are 2.0 and 3.0. You can even download WSS 2.0 and WSS 3.0 from Microsoft's site today.
2) SharePoint Portal Server 2003 is the enhanced SharePoint product you purchase. It is built on top of WSS 2.0.
3) MOSS 2007 is the enhanced SharePoint product you purchase. It is built on top of WSS 3.0.
What does this mean for IntelliGantt users? It means IntelliGantt works with the free version of SharePoint (the core WSS) AND the not-free version of SharePoint (Portal Server 2003 and MOSS 2007).
I think that is right (Toby?...). Now back to programming with WSS. For my next post I might just divulge our next feature, or maybe I'll preview our upcoming MindManager Add-In.