The article is entitled "AES proved vulnerable by Microsoft researchers". What does this mean to you? At the moment not much, but it does mean the the current gold-standard in FIPS-140-2 encryption standards, AES-256, is now less secure than it was thought to be just a few days ago. However, this is thought to be just the first vulnerability likely to be found, and as computers get more powerful and more vulnerabilities are found, there might be a point in the not-too-distant future when you may not be HIPAA-compliant or in compliance with Meaningful Use if you use "only" AES-256 encryption.
The first chinks in the armor of HIPAA security