We have to wonder about a lot of the iPod accessories we’ve come across lately, but here’s a handy looking little portable speaker with a built-in dock for 2nd generation iPod nanos. It comes in colors to match the different nano colors (pink, green, black and white), and has a custom-sized dock that fits nicely inside the device while still exposing the navigation controls of the nano.

The DOC speaker dock also has a carrying case and runs on 3 AAA batteries. This portable speaker system appears to be a reasonable …