The Pogoplug is a small device that plugs into your wall, and connects to your home router and to any external hard drive. After setup, you can share and access media and files from anywhere in or out of the home.  Pogoplug is tied to an email address and protected by a password. There is a direct connection between your computer and the Pogoplug (fully encrypted), and everything outside of your network is done using an encrypted tunnel. Pogoplug creates a vpn into your hard drive over the Web using an SSL connection created via email address/password authentication.
Every review I’ve read is positive --- take a peek:

 • Gizmodo: Pogoplug Review: Share Any USB Disk Over the Net (Even to iPhone)
 • Engadget: Pogoplug review
 • cnet: First hands-on with Pogoplug
 • CrunchGear: Review: PogoPlug USB hard drive network sharing
 • Popular Science: Access Any Hard Drive from the Internet