There are something like 10 million people using Twitter now, depending on who you believe. Small compared to Facebook, which just passed the 200 million "member" mark, but certainly not insignificant.

We’re putting together a list of the 20 most essential Twitter feeds for magazine executives to follow. (Aside from FOLIO:’s essential @foliomag feed, of course.)

Got one? Send to tips [AT] foliomag.com.