The link below is for a twitter list of all the participants in the study group, (or at least all those I’m aware of presently who have twitter accounts). One can subscribe to the list or individually follow each of those on it as one wishes.
Twitter list of participants in the category theory study group
If you use twitter, please feel free to add your handle as a comment below, and we’ll add you to the list.
A Twitter list help page is available for those who need it.