Also, adding an iOS device does nothing for the same need for accessing network storage on the other devices (Xbox 360, PS3, etc.).
Synology has an app that makes the media available to other devices such as Xbox/PS3/etc. The app isn't iPhone or ATV only, they have the app for other Smartphones and you can stream to various other devices besides an ATV as well.
I was thinking about the Synology box. They actually have a nice set of cross platform apps to manage and use what is on their box.
DSM 5