I thought I would let you guys know of my new setup too. I saw SwampRat post this right after I had bought my stuff.
I ended up going with this Arkon dash tablet mount. It is spring loaded to hold on to the tablet and does quite well at it. Takes a bit of work even with two hands to take it in and out of the holder. I had looked at the one SwampRat posted but with the price of the smaller one and some bad customer service reviews, I passed on it.
Arkon Dash Tablet Mount:
http://amzn.com/B0072LATRYAnd for the tablet I am using the new Nexus 7 (2013). I decided on the new version just in case I feel like using the track recorder since this does have a camera on the back side unlike the previous Nexus 7. Although the video could get a little shaky since the mount isn't super sturdy being it has such a long arm.
Nexus 7 (2013):
http://amzn.com/B00DVFLJDSAnd finally I also got one of the cheap OBD-II bluetooth adapters to. Supposedly it is hit and miss with these, but mine seems to be working just fine.
OBD-II Bluetooth Adapter:
http://amzn.com/B009F4JHHOAttached should be a couple pictures of the setup installed in the car. I was able to mount it in the same location that SwampRat was looking to as well and sits over the edge of the dash on the passenger side. And one of the pictures shows it from roughly the drivers position. The tablet is small enough and mounted lower enough it doesn't really block any of my view. I am a little taller so that kind of helps me, but it may vary from person to person and how it is mounted. I did used the supplied mounting disk to stick to the dash as I've hear of problems with it leaving dimples on the dash.
But all and all I am very happy with it after at least the couple days I've had it along with it being on a road trip.
On a side note, just make sure you know your state laws on video screen restrictions. I was warned when talking to a guy at Best Buy about this and though I'd check on it myself. I've found that it doesn't appear there are any laws here in Iowa to prevent me being able to do this, but it could be different where you live. Thought I'd give a couple pages showing some of the rules by state.
https://www.ce.org/Consumer-Info/Car-Electronics/Got-It/State-Laws-for-Electronics-Use-in-the-Car.aspxhttp://drivinglaws.aaa.com/laws/telematics/Can't wait to see what you do with your setup too SwampRat with the larger tablet!

(I apologize if this ends up being a double post)