I'm running the same setup, but I haven't really haven't mounted the tab. I've been waiting to find a bezel to play around with, but have had no luck, so in the mean time I'm just using the tab and placing it on my lap, I have a stereo bluetooth adapter hooked up to the amp, and automateit set to open Apollo (media player) as soon as it connects to the BT adapter. Sound is good, but I need to get another amp and an external volume control... plus I need to mount the tab, but I'm also going to probably wait 'til I get a nexus tab, or the new kindle fire which I much rather use just because I'm not a fan of Nvidia... of course, if amazon doesn't have either a) sdcard slot, or b) usb host functionality, then they are out of luck.
I just wish I could mount it outside so that I can remove the tab when I get out of the car, but at least with the A100 there's no way to do it so it looks clean, at least none that I can think of. I bought one of those sleeves for the tab, thinking I could slap something like fiberglass on it to harden it to make a cradle, but the tab is a wee bit too wide to fit properly.
*EDIT* I almost forgot, I also set the tab to say "Hello Manny" when it connected to the BT adapter. I freaked out a friend one time since I set up a 5 sentence conversation between me and the car, for a sec I had him thinking I was called Michael Knight

*EDIT*
This post has been edited by masr1979: Jul 10, 2012 - 6:40 PM