Streaming music from my PC to my TV

Yes, you can use a device like a Western Digital, or Sony Streaming Device. Both use wifi, and you connec them to your television!

http://www.amazon.com/Sony-SMP-N200-Streaming-Media-Pla...

http://www.amazon.com/Western-Digital-Streaming-Media-P...

If you have an Android phone, you can just hook the phone to the wifi network (infrastructure or ad-hoc) to access your shared music and play the music with the phone. The only cable will be between your phone's audio out to the TV's audio in.

You need a cable like this:
http://www.newegg.com/Product/Product.aspx?Item=N82E168... (I assume you mean 3.5mm stereo when you said computer in)

Not saying fruit brand, Nokia or Window phone won't work. It's just that I am not sure how to set it up.

This is EXACTLY what I was looking for. Too bad I already bought the cables to connect the PC to the TV... Maybe I'll try to return them.

Thanks everyone else for the answers too!