I've been having a very hard time finding a good optical splitter. I do not, repeat, DO NOT want any cruddy passive device. Why? I've tried them FOUR times. I purchased 2 from Fry's didn't work. I purchased one of those rotary switches from ebay, same deal. Finally I ordered another rotary switch from Amazon that had great reviews, it worked... if I wiggled all the cables involved around until it worked.
So instead of 4 outputs and 1 input, I need 4 inputs and 1 output. Really I only need 3 inputs. My setup is:
Surround sound unit with 1 optical port
So I need to hook the surround sound into the output, then my devices into each input. I can't find any active device like this. All the guys at Fry's and Best Buy etc looked at me cross-eyed. They said they've never even heard of such a device and I'm the first person to ever ask for it.
My goal is to have surround sound with all of my devices. And yes, I checked, doubled checked, and triple checked that ALL of my cables work perfectly fine.
Look for a used Psyclone PSC47 on eBay. It's a 4-source HDMI switch, but it also has an optical input for each of the 4 sources (and 1 optical out. More than you need, but has a remote for convenience and it's built well. I'd expect to pay around $70-75 for one in very good condition.