..and in doing so they have broken the DIN standard, and can nolonger claim to have a DIN mounting bay. Luckily I haven't heard of many cases of this.

The problem's pretty widespread - all Toyotas in particular. DIN standards are pretty widespread, but still not something manufacturers adhere to very strictly. Most Japanese cars use non-DIN side mountings. All of the mainstream aftermarket ICE manufacturers allow for this by providing side mounting provision on their units. Something that's far less easy with a pull-out unit. In most cases (Nissan, Mazda, etc) it's not too much of a problem, as you can remove the OE unit and install a DIN unit from the front of the dash, but Toyota seem determined to continue using the side mount system. With most of their vehicles, mounting a removable DIN unit means widening the dash aperture slightly.

Dominic

Cambridge Car Audio
http://www.cambscaraudio.co.uk