Both aspects of the website are equally important to us. Your point about giving more prominence to the forums is fair, and we'll look into how we can fix this. Thank you for your feedback.
This has been a point of discussion for quite some time. And changing the layout of the forums is definitely on our to-do list.
I think the feature you're talking about does exist on the desktop website, but yes it is a bit hard to find. You can click on "Today's Posts" under "Quick Links" in the top nav bar. I hope this is what you were talking about.
To keep the home page more simple and relevant, we've moved the featured cars to the Used Cars section. The option to get your ad featured is still there, as @chaudri also pointed out.
Sorting options for the cool rides section are almost ready and will hopefully be launched in a matter of days. You'll have many options to sort rides.