Input in the form of a comment can be submitted by scrolling to the bottom of the blog page and typing into the "Comments" window. Blog articles can be submitted via email to journal.blog@mathunion.org. The International Mathematical Union and the International Council for Industrial and Applied Mathematics (ICIAM) jointly constituted a Working Group to study the issue of whether and (in the affirmative case) how both organizations should go forward with a Ranking of Mathematical Journals. The Report of the Working Group is available here.