OK, here are a couple short videos using the 2.8mm lens on the GoPro. Still a bit of movement, but not as bad as the 3.6mm which looked like the "Blair Witch Project".
I know the angle is a little low and I will adjust that up next time. I have a kid on a mini behind me so no warp speed action, but I was anxious to get some footage.
The first is a rough climb that is all uphill except the last 30sec.
http://youtu.be/NXyiz0Qe63o
This one is part of some brand new side mountain single track that needs a little more riding in. First time on the section of trail since the leaves came back. The camera mutes the off cambers a little but its better than the stock lens.
http://youtu.be/pAJqffFVmzM
Think its too jumpy? Puke on your keyboard? It is rough, smoother trail should look a lot better.