Just thought I'd mention that this little
iHome iHM60GT Rechargeable Mini Speaker sounds great with the Iconia tablets!
It has a battery that recharges via USB, and the headphone cord is longer than others I've seen (about 32"). The speaker itself is only 2.25" across, but the sound is amazing! You can daisychain two together, but one speaker seems fine to me.
Amazon sells it for $19.99, but it's currently out of stock there. More are expected in early to mid February. I was able to buy one at a local Staples store for the same price.
Right now I'm listening to Beatles music using the free
TuneIn Radio app. The latest version of this app has "car mode," which you can use to speak commands. Love it!