Viacom Split
From the "oh, great, 'cause that wasn't complicated enough already" department, and according to TrekToday:
Viacom Inc., the entertainment giant that owns all aspects of Star Trek from Paramount Pictures films, UPN television episodes, Paramount DVD releases and Pocket Books novels, is dividing into two separately traded companies [...] which will create CBS Corp. as a separate entity. The new company will include both the CBS and UPN television networks, the television stations now owned by Viacom, CBS and Paramount TV production and book publisher Simon & Schuster, as well as cable network Showtime, Infinity Broadcasting radio and Paramount Parks. Viacom Inc. will control Paramount Pictures, Paramount Home Entertainment, MTV Networks, BET and Famous Music.