http://www.twonkymedia.com/beam/

Twonky Media (I use their music server software as it was the only one I could find that worked with all my devices, i.e. XBOX360, PS3, SoundBridge) have just released this neat IE plugin - basically, it allows you to "push" media (audio, video, images) from a website on your PC to any of your networked devices (in my case, most practical use is surfing on laptop which is not connected to my hifi - if I find a track on say Last.fm I can send it to the SoundBridge which IS connected to the hifi. Depending on what you've got connected, you could for example send YouTube videos to a wireless "photo frame".

Might be useful for someone, and its free, so have a play!