Sirius XM has released an iOS 4-native version of its online radio app. The upgrade brings it up to par with versions for other mobile platforms, such as th Android, by supporrting the playing of aduio in the background.
Plus there is now an option to reorganize favorite channels, more fine-grained control in the settings, and overall fixes. Background audio as with other apps needs an iPhone 3GS, iPhone 4 or third-generation iPod touch using iOS 4, but most of the other changes apply to all devices.
