The MVix Wireless HD Media Player gives you access to all of the media in your home, when and where you want it. Sure, this sounds like the Apple TV, but it offers a competitive alternative.
Not only is the MVix an external hard drive enclosure (you'll have to provide your own), but it also allows you to stream media to your television or a monitor. It's a movie player, music system, and internet radio all rolled into one.
Don't have an HDTV? Don't worry, you'll still be able to connect to the Mvix, as its got just about any video connector that you could need. Got a monitor instead of a TV? You'll be able to connect using DVI. Are you a holdout with an old tube tv? You can still use this device with RCA cables. All-in-all, this is pretty flexible streaming media system.
Available at ThinkGeek for $299.