SiriusMac is a super cool application I just stumbled on at the Apple Downloads site. You have to install MacPython, but that’s very easy (follow the prompts) and then you are on you way. If you’ve got a Sirius Radio subscription this is infinitely simpler than browser streaming which is a royal pain for Macs. The best feature is a single CAPTCHA rather than having to enter one each time you run.
You can set alerts for artists you want to hear (like on a hardware radio) and get Growl support so it’s easy to see what’s playing as things change. You also get a popup guide which shows what’s on each station …
Happy Listening!