Hi,
I thought it would be good to update this thread with some current information.
A full and better working version is now included in Blender. IF you have the latest version of blender than you have a better working version of IvyGen.
I would use that from now on. I don't think they are ever going to update the stand alone.
Some of you may have already known this but I just found out And I wanted this thread to have the info, sorry for bringing up old posts. Also I feel better about not getting to write that tut on this, since the info is out dated.