Unified can store and play iTunes in Unified as long as they're converted into an MP3 format...

n order to transfer your iTunes or music into Unified, they must be in an MP3, .WAV, .AVI, or .WMV format. You can Drag any music file with these extensions directly from iTunes into a temporary folder or onto your desktop and then Drop them into Unified.

To convert your iTunes into MP3's, right-click on a music track in iTunes. Select the option to Convert Selection to some other format. You'll need to change your import settings to get iTunes to import the track as MP3.

In iTunes 8, go to Edit / Preferences / General and click the Import Settings button. In older versions of iTunes, click on Edit / Preferences / Importing (or Edit / Preferences / Advanced / Importing). Your goal is to change the Import Using from the default setting to "MP3 Encoder". Click OK to save this setting.For more info see: Preview Pane, Media Preview Player