Depending on how much this is, I'll either make my own or buy it. I'm in the process of making one now for my hero and total out of pocket cost (assuming I ever receive the item from china) will be less than $10. If I do receive it, I'll make a write up or link the write up I used to do it. So far, its been about a month and no windshield mount.
Hope it comes out of the box with a dock. The HDMI/Charge dock indicates "post launch" availability which would suck if no dock were available. Of course, it will have that nifty kickstand...