I know! I hit 20 really fast. At the bottom of my profile page, I have links to 40 more that I'd like to follow.
I thought I had hit on an answer, at least in part, by using the project accounts to carry project-specific tags. Louisiana Families and Louisiana Categories have a good collection of tags, as does the MatchBot Monitors project account. But the Google Group members receiving e-mails from the Magna Carta project objected to the increased e-mail traffic, so that project account follows no tags. <sigh>
Perhaps it's time for me to ask again about having it follow some.