I' actually using a LMS like i told before ,which seems to be the most used here (may be i'm wrong) , and in my actual work we (where i work) have planned to ask our courses providers (external societies) to make them build their courses using AICC only.
Why ? Because AICC is used as a standard here more than scorm can be, even if it lacks some functionnalities, the goal is the same : to provide guidelines for courses deployment and retreive informations from the learner. And it succeeds quite well as i can see.
Nevertheless, SCORM is the future, and you're right to plan being compliant with it. But please don't forget the main part of the others.
Moreover, i think that making the Atutor compliant to AICC will be easy when SCORM will be implemented (basic rules are the same).
Thanks & Regards