I am going to try to post about new articles on Hebrews as I become aware of them. So far, at least two new articles on Hebrews have appeared:
Allen, David L. "The Authorship of Hebrews: Historical Survey of the Lukan Theory." Criswell Theological Review ns 8.2 (2011): 3-18.
Thanks to Charles Savelle for the tip.
Scott Mackie also informed that he has a new article published:
Mackie, Scott D. “Heavenly Sanctuary Mysticism in the Epistle to the Hebrews.” Journal of Theological Studies ns 62 (2011): 77-117. Abstract.