Groupon offers the Altec Lansing Octiv Duo iDock, model no. M202, for $40 with $5 for shipping. That's $5 under our June mention and the lowest total price we've seen. (It's a current low by $11.) The Octiv Duo iDock allows you to dock and play two iDevices at once, or charge up to three devices. It includes a remote control and USB port. Deal ends September 30.

Although this is listed under Groupon Houston, it can be purchased by anyone nationwide.