Those leather covered air vents are useless but I suppose it takes time and labour to cut the leather and glue them...
Here's probably the stupidest accessory from Honda based on the price:
CRV Portable navigation
$794.18
Easy to use interactive touch screen. five bilingual dictionaries for easy translation. travel guide to help you find restaurants and hotels. Currency converter with up to the minute rates. picture viewer to scroll through your vacation memories.
Here's the $89 tomtom ripoff...