For several months there has been talk of a XM Sirius iPhone/iPod Touch App. Now it appears more and more likely that the application may be here tomorrow, June 18. The unofficial Apple Weblog TUAW talks about the following mail that has been sent to Sirius subscribers who have asked about an application.

“Thank you for contacting SIRIUS regarding whether or not there is a SIRIUS iPhone application available. We are here to help! We appreciate the time you have taken to contact us in regards to this matter! We are happy to inform you that beginning June 18 a SIRIUS Internet Radio application will be available at the Apple iTunes App-Store for the iPhone and the iPod Touch! All Premium SIRIUS Internet Radio subscribers will be able to download the application from the Apple iTunes App-Store for free on their device and access the service at no additional cost! Subscribers who are listening to the Basic Online Service for free must first upgrade to the Premium Online Service for $2.99 per month to access the application on the iPhone or iPod Touch.”

Perhaps XM subscribers will also be offered the same. Getting XM Sirius on the move is the appeal behind this offering. You can also bring it to your home audio system via the iPhone or iPod Touch.