I've just bought a 2011 Mazda 2 and although it has AUX support on the radio I really want/need bluetooth. After looking at Pioneer and Kenwood, I thought I'd check the Sony website and stumbled across the XSP-N1BT.
http://www.sony.co.uk/electronics/in...ayers/xsp-n1bt
It supports all phones through bluetooth but I was planning on getting a Z2 when it comes out and this thing is designed for the new Xperia phones, with the charging done through the side strip.
The release date is supposed to be May and it'll retail about $250, no word on UK pricing when I checked last week. It's exactly what I am looking for so thought I'd mention it, looks like it was announced in January but I hadn't heard about it until finding it by accident!