Weekly schedules come out on Saturday night. You can call Universal Guest Services at (407) 224-6350 and someone will track down the info for you.
Unfortunately, there is no website similar to the WDW one kept by Steve Soares that publishes the weekly entertainment schedules.
Just to give you an idea - some examples from this week's schedule are:
Beetlejuice - 11:30, 12:45, 3:15, 4:30, 5:45, 7:15, 8:30
WWW West Stunt - 1:45, 3:00, 5:00, 6:15, 7:30
Animal Planet Live - 11:45, 1:15, 2:45, 4:45, 6:00, 7:15