There has been much more discussion about the Blackboard patent case following the filing of two separate appeals to the U.S. patent board last week - in addition to the one filed by the open source LMS organizations, as Seb Schmoller reports in detail, Desire2Learn files it's own appeal with the U.S. Patent Bureau. Ars Technica focuses on the open source application. Coverage from Inside Higher Education. The Chronicle, meanwhile, remains the one source of coverage you can't read (don't know why they even bother, really). Sakai's statement and FAQ. . Michael Feldstein argues that the challenges have less to dfo with open source than with the fact that it's Blackboard's customers that are taking this action. Feldstein also explains in detail the distinction between ex parte and inter partes patent re-examinations.