It might be ugly, but it works, and if you already have a bungee cord it will only cost you $1.99.
• short bungee cord
• wood clamp with plastic coating on the grips
Home Depot HDX 2 in. Spring Clamp Model # 80002 $1.99
One use for an iPad in the car
I have a long, stop-and-go commute out of the city after work. I was listening to podcasts and audio books, but it still felt like a tremendous waste of time. Recently, after reading a post on Lifehacker, I tried iTunes-U. I downloaded an IOS programming course with video lectures. It is a combination of XCode demos and slides. I was using the iPhone on a dash mount, but it is too small to read the code. I have plenty of time to study a screen, as there are at least 20 lights and fullstop merges between work and home. Now I can listen to the audio lecture all during the commute AND I can read the code and bullet points on the slides while stopped in traffic.
Step 1: Short Bungee Cord
Find or buy a bungee cord just long enough to span your middle air vent. Knot it to shorten if necessary.
Step 2: Wood Clamp
Buy a wood clamp with plastic tips. The plastic tips give it a good grip, and won't damage the surface of the iPad. I first tried this with a big binder clip, but it slipped right off.
Step 3: Attach Bungee to Air Vent
Hook both end-hooks of the bungee cord over one of the air slats on opposite sides of the air vent.
Step 4: Open Wood Clip and Insert Bungee
If the bungee cord is short enough it will hold the clamp upright. I leave it like this when not in use.
Step 5: Insert the Top Edge of the IPad Into the Clip
The clamp is very strong and a little hard to open with one hand at first. It gets slightly easier, or maybe my hand got stronger, as it is used.