Anyone who has ever shopped for an iPod speaker knows that there is no shortage of models from which to choose; options range from to the . Heck, you can even get a case with a speaker built right in: the iMainGo 2. This follow-up to Portable Sound Laboratories' popular iMainGo offers the same compact, innovative design and affordable price tag ($39.99), but includes upgraded titanium speakers as well as fit tweaks that allow it to be used with a greater number of MP3 players. It's a great choice for anyone who wants to rock out loud on the go. Read the review.