I watched this a few weeks ago. VERY VERY interesting. I never realized all of the pieces of UPN. I know, as a black community, we watched UPN all the time, and was kind of distraught when the network disappeared. I always thought UPN was consistently the 6th place network, but apparently, it traded spots with WB (and sometimes FOX).
Make sure if you watch this, you block out like a good hour and some change to watch! Hopefully he will do the WB at some point.