I like your idea but actually inserting the block and then moving it could result in the user canceling the move portion and result in a block insert that they didn't actually intend to have.
I still think I need to better understand how the Entity Jig works better.
I know there are a lot of Entity Jig examples but I have not found one that is similar to this.
Here is a video from a different CAD program that does what I'm looking to duplicate in C# for AutoCAD:
http://screencast.com/t/MTgzZDQ4NGIIn that program once you have the Entity Jig started you can hit the spacebar and it then switches the Entity Jig insertion base point to the next node point in the block definition. In the video I'm just iterating through the different block definition node points as I drag the block around.
Thanks for your suggestions!
Doug