Woot via Amazon offers the Boom Movement Urchin Ready 4 Anything Water-Resistant Bluetooth Speaker, model no. SUBK-A, for $39.99 with free shipping. That's $5 under our September mention and the lowest total price we've seen. (It's a current low of $20.) It features track and volume controls, removable silicone skin, speakerphone capability, and microUSB. It includes a carabiner clip, suction cup, and adhesive mount.