I don't know if anyone has posted the idea but I think having the option for members to tune in to the same playlist would be cool. I bit like the new blackberry thing where I can be listening to a playlist and my friend, where ever they are, can listen to it with me on there device!
Although this idea has been suggested first, I'd like to point you at a more popular, similar idea here:
Add your kudos there please! 😉