About three months ago I did a mini round-up of iPod speakers, but while each of them were portable, none of them were really suitable for travelling light. If you want something to supply tunes in a hotel room when you're on the road, you're probably not going to want to pack the iPod Hi-Fi into your bag. That said, what's noteworthy about the mm32s is that they are not designed exclusively for iPod's - you can also use them with any other brand of player, though inevitably it's the iPod that has influenced the design and styling.
Build quality isn't the best. It needs to be light as it's portable but I wouldn't be confident of it surviving too heavy a fall. The volume buttons on the front also had too much flex for my liking.