I have not seen an official announcement about this, but I was on the Oxford Journals site just now and discovered that it is possible to freely access the full-texts of all articles. Perhaps this is a glitch or perhaps this is a public relations campaign to promote their new platform (similar to what SAGE Journals is doing). Regardless, visit your favorite Oxford Journal ASAP and enjoy!
Here are a few links to help you out:
International Journal of Refugee Law
Journal of Refugee Studies
Refugee Survey Quarterly
UPDATE: I guess it was a glitch after all! Articles are no longer accessible.