The Garmin GDR 35 is an interesting camera released in December 2012. It can be used as a single camera to record at 1080p at 30fps, has GPS and G-sensor.
Cost is $230 digigomart on Ebay
. Overall, video quality appears good during the day but average at best for night.
As a single lens camera, this camera appears to be a bit expensive for the quality.
However, if you buy the separate Garmin GBC 30 camera or the GDR 35D package this can be used as a dual lens system (unfortunately I haven't seen the GBC 30 or the GDR 35D package for sale).
As a dual lens system this is more interesting. Both cameras record 720p at 30fps (only a few dual camera systems do this). Day video quality appears to be good.
I couldn't find any night videos but I would imagine they are below average given the night video quality at 1080p.
I like the size and the ability to use it as a single cam or dual cam. The price of the dual cam package is about $310 USD on the Taiwan sales sites. Really the main drawback is the night quality. I wonder when Garmin will decide to market these dash cams outside of Taiwan.