You could add your last.fm feed if you are srobbling so everyone could see what you are listening to on iTunes or Windows Media - it updates Jaiku after every 10th song you listen to (at least that's how I think it works!)
About the TV-Computer idea - if you do this, make sure you debunk the whole cable myth i.e. you really don't need to buy $100 cables - the $8 one is just as good!