Here is the Building Brick iPod Speakers also known as the iPod Brick and the iBrick. The Building Brick Speakers looks like the original Lego block although it won’t fit with a regular Lego block. The iBrick will work with any 3rd-5th gen iPods, 1st-3rd gen iPod Nanos and on the iPod touch.
The center bottom pegs are the Volume up and Volume Down buttons. The iBrick is on retailer over at Think Geek for a $20 price.