iMT630 has been pitched by Altec Lansing as an “ultra-portable” speaker system, and though it’s hard to hear those words without thinking of the company’s famously 0.67”-thick iPod nano speaker iM500, this new design is definitely smaller than most of the current iPod/iPhone docking speakers we’ve seen in the last couple of years. Measuring just a little over 12” wide by 5” tall by 1.5” deep…