Unfortunately, this was when I discovered that Tumblr's RSS import, to put it diplomatically, is less robust than I'd hoped. Or, put less diplomatically: it sucks. A lot. Sometimes it works for a week, only to spend the next two weeks working sporadically or not at all. I am halfway convinced most chimpanzees, with or without a degree in computer science, could have done a better job coding things.
I've been putting off announcing calufrax.tumblr.com until Tumblr got its act together, and finally, finally it seems to have been working reliably for several weeks. (Watch now as my optimism jinxes it and RSS import falls over dead later today.)
Anyway, if you want to follow calufrax.tumblr.com, it's there, delivering the same wonderful calufrax recs to you on your Tumblr dashboard ... probably.