At first the Audi audio unit above appears to be a typical CD/DVD drive.  That is, until you notice the SIM card slot placed between two SD card slots.  Yes, this head unit is really a 3G WiFi hotspot on wheels – taking your SIM card and filling your car with glorious WiFi.

Audi announced their Mobile Media Interface (MMI) system with WiFi earlier this month, and today the device showed up on the FCC.  As you can imagine, there are a ton of benefits to having a car constantly connected to the net.  You can download all sorts of real-time navigation and POI data, as well as traffic information and satellite imagery.

But lets be honest, what we’re all looking forward to is driving around while surfing the web.  At least for Audi passengers.  Imaging taking a road trip without losing Internet access.  That means Hulu on the road, not to mention mobile TV if you have a Slingbox.

We’re not exactly sure if you need to provide your own SIM, or if Audi will partner with local mobile phone carriers.  Hopefully, Audi will negotiate a low monthly rate for data access.

Audis with mobile WiFi are expected to hit showrooms in July 2010.  It’s unclear if Audi will offer MMI WiFi in all of their models, but we do know that at least the A8 will be available with this feature.