It looks like most Phys.org articles can still be posted:
“Use of PhysOrg.com
You may not copy, reproduce, republish, download, post, broadcast, transmit, make available to the public, or otherwise use physorg.com content in any way except for your own personal, non-commercial use. You also agree not to adapt, alter or create a derivative work from any physorg.com content except for your own personal, non-commercial use. Students, teachers and professors are free to use, reproduce articles and copy PHYSorg content for academic purposes without obtaining prior written approval. The only request is users shall provide a credit and source URL link of the original PHYSorg article. Any other use of physorg.com content requires the prior written permission of the PhysOrg.com. If you would like to request permission to use any of the content on our sites, please review our copyright notice.”
I guess I stand corrected. This is non-commercial use, but not “personal.”
Bummer. I wonder how long this has been the case.