Looks like the Subaru at TMS has one of these, although this specific one is for an electric car
http://pioneer.jp/carrozzeria/ev/index.html
There was also a report in motortrend that nav will be standard on the BRZ.
I have a pioneer nav in my car now and I love it. Also looks like this one has some tie ins with the ECU. Maybe it won't be such a bad thing after all.