I just got back from AOSD.09 in Charlottesville, VA. Now that the conference is over my paper that I presented at the conference is now online at the ACM Portal. I have also put up a PDF here for those that are not ACM members.
You can read the abstract at the ACM page to see what it is about. But just a heads-up that the paper has nothing to do with Python; it's all Java/AspectJ in terms of coding stuff and assumes you know both.