Wow. The new reg is linked in the article: AR 530-1 OPSEC, dated 19 April 2007
2–1. All Army personnel
Operations security is everyone’s responsibility. Failure to properly implement OPSEC measures can result in serious injury or death to our personnel, damage to weapons systems, equipment and facilities, loss of sensitive technologies and mission failure. OPSEC is a continuous process and an inherent part of military culture and as such, must be fully integrated into the execution of all Army operations and supporting activities. All Department of the Army (DA) personnel (active component, reserve component to include U.S. Army Reserve, Army National Guard, and DA civilians), and DOD contractors will—

(skip to applicable item...)

g. Consult with their immediate supervisor and their OPSEC Officer for an OPSEC review prior to publishing or posting information in a public forum.

(1) This includes, but is not limited to letters, resumes, articles for publication, electronic mail (e-mail), Web site postings, web log (blog) postings, discussion in Internet information forums, discussion in Internet message boards or other forms of dissemination or documentation.

(2) Supervisors will advise personnel to ensure that sensitive and critical information is not to be disclosed. Each unit or organization’s OPSEC Officer will advise supervisors on means to prevent the disclosure of sensitive and critical information....
and then there's:
(15) Because the Internet is a public forum, commanders will ensure that in addition to the OPSEC officer, a public affairs officer (PAO), webmaster/Web site maintainer, and other appropriate designee(s) (for example, command counsel, freedom of information act (FOIA) officer, force protection, intelligence, and so forth.) have properly cleared information posted to the World Wide Web, unclassified intranet, or Army Knowledge Online (AKO) in areas accessible to all account types. (Possible risks must be judged and weighed against potential benefits prior to posting any Army information on the World Wide Web. (See AR 25–1, para 5–10.)

(a) The designated reviewer(s) will conduct routine reviews of Web sites on a quarterly basis to ensure that each Web site is in compliance with the policies of AR 25–1 and that the content remains relevant and appropriate.

(b) The minimum review will include all of the web site management control checklist items in AR 25–1, paragraph C–4e(30) and appendix C. Information contained on publicly accessible Web sites is subject to the policies and clearance procedures prescribed in AR 360–1, chapter 5, for the release of information to the public.
This has the potential to kill everything but official forums (i.e. BCKS, MCCLL) - after a select few have been identified and made an example of to others. Hell, even posting on AKO is now under review.