Here are the most recent FAA Advisories: http://www.fly.faa.gov/adv/adv_list.jsp?WhichAdvisories=ATCS...
And here are three relevant ones already published:
* http://www.fly.faa.gov/adv/adv_otherdis.jsp?advn=26&adv_date...
* http://www.fly.faa.gov/adv/adv_otherdis.jsp?advn=27&adv_date...
* http://www.fly.faa.gov/adv/adv_otherdis.jsp?advn=29&adv_date...