There's a new one: the Xdreme.

Xdreme 1080p Action Camera Review - YouTube

It looked really promising with AUTO HORIZON. ..'till our friend from the UK tells us that the feature is not available while recording. I like his reviews, simple without footnotes on what Bokeh is ..doing pretty much a common man walkabout.

Jim

Thanks for posting that Jim.

They have addressed the couple of problems I have with the hero2 namely settable white balance and a +/- exposure bias. Maybe GoPro will take note.

I went to sleep during the review....does he mention price?

He didn't mention the price because it varies all over the web. Just go for the best price you can find, I say.
He did rather complain that the camera was making the shot too dark, but in reality he had lots of sky in the shot and the camera was simply adjusting the overall exposure to give the best result. No clever spot metering or centre weighting here.

He also said the camera took a long time to adjust its iris to the changing lighting conditions, but I'd be very surprised to learn it had something as expensive as an iris on board. I'm betting its the same as the Extreme cam in that exposure is controlled by adjusting the ISO value and the shutter speed per frame.

He's right to say the front element is a piece of flat plastic (so that the cam shoots sharp footage under water) but the new design stops you using the top off a WD40 can as a push-on lens cap. About the only thing missing from that box of bits 'n' pieces.

tom.

Thanks Tom. I need to look again. I couldn't find it anywhere on the web, just the Extreme.
It looks interesting. I'm not going to sell my GoPro's but I am going to start testing some of the competition.