Have some vinyl you want to listen to anywhere in the house? The folks over at Mozilla (yes, that Mozilla) wanted to find a way to get one record player to stream audio throughout the entire office. Their solution was a Raspberry Pi.
You'll need a record player with a USB port for this to work. Essentially, the record player connected to the Pi, then goes into Icecast, which streams the audio out into the network.
Sure, this is probably not going to replace the variety of streaming and digital solutions to this problem, but it is a fun project nonetheless.