Well my car doesn't seem very popular so while on vacation I cooked a couple of logon screens up for it. It's based on a blackberry theme called iBerry 2.0.
If you all like this & want to toss your images in send me a PM & I'll get you a version of the template I made up.
And as a side note I'm seeing a lot of people using extremely low res logos for pioneer, premier and the like and wanted to suggest downloading the AVIC F series manuals from the pioneer website, you can hit print screen and get the logos in a very high resolution that won't look absolutely horrible when you need something larger than the default sizes. It's always better to scale down than up 

