I took your recommendation and looked through Google+ for communities that interested me, and didn't see anything promising, but the idea does have some potential - I do follow Linus and a few authors, and would probably check Google+ more often if I could find more interesting content, but I haven't found a killer feed to make it part of my daily routine yet.

I suppose different people use these sites in different ways, though, and I might check back periodically, but for now Google+ is just a Skype replacement for me.