Twitter suggested I Follow that (eBooks are my thing). What's up with the Twitter trademark being used, tho? Does Twitter intend to start "official" channels l

Twitter suggested I Follow that (eBooks are my thing). What's up with the Twitter trademark being used, tho? Does Twitter intend to start "official" channels like that to guide new users in? Anyone know? EDITED TO ADD: There's also TwitterMovies and TwitterTV. I wonder how many of these exist?