… or another bout of more-or-less shameless self-promotion.
I took the initiative, and invited some of the relevant Powers That Be to start an -themed group blog: The Infinite Seminar.
I also perceived a lack of blog aggregators, so I started Planet Math Blogseminars to aggregate group blogs in mathematics.
While I was at it, I bought the blogseminar.net domain. I’d be happy to allocate subdomains of this to decent enough blogs that wants in on it.