I’ve been enjoying Slacker radio on my squeezebox ever since I got it. I love the genre stations I’ve picked out (Indie, indie hits, 80’s alternative, and classic jazz) and the custom stations I’ve created have also been great. I have never been able to get Pandora to do what I want, but slacker has done the job for me. At 4 bucks a month, it’s well worth it to me.
I’m intrigued by their cache option. They say I can cache the station on my iPod touch and then play it offline. For you iPhone users, you do this over wi-fi so you don’t chew through your bandwidth limits. That would come in real handy for the car. I’ll update you on how that goes. I also have to figure out how to do the song request thing on my squeezebox. I love having the radio without dealing with FM!