One of the features I like most with the Apple TV is the ability to synchronize content from my iTunes library to my Apple TV. This integration is the single reason I no longer bother with many of the Apple TV plugins.
This request is actually in two parts.
1. For content (video, music photos) already synced to the Apple TV, I would like Boxee to be able to scan the local drives and import this existing content. Likewise, on my Mac, I would like Boxee to be able to show content that resides in iTunes. Mozilla's Songbird media management software can import from iTunes and export to iPods. I recall media is stored on the Apple TV in a structure similar to that on the iPod.
2. I understand Boxee can mount remote drives or I could copy files locally to it via whatever protocol I want. However, it would be kickass if there were an iTunes clone that would manage the media library on my Mac/PC and sync to the Apple TV in a way that Boxee can read and import. Something like Mozilla's Songbird, http://getsongbird.com/. "Songbird promises to be the firefox of media players". This could be done as a Songbird plugin. I'm going to investigate this.