On my morning stroll around the TIGSource forums I found this gorgeous downhill bike game prototype by Megagon Industries. The art style at the moment is lovely and I really like the way it's animated. Apparently it's such early days that the game doesn't even have a name yet but come look!
So far the three-person team has been focusing on getting the bike physics and the controls right. They say that aside from the bike and rider the art assets are actually placeholders although the low poly look is "already a good impression of the final style we're aiming for."
As it's such early days the game itself could change a lot but it's currently being billed as being about riding downhill along different mountain tracks, dealing with different obstacles and ground types.
The forums picked up on a SkiFree-ish inspiration which is cool and the official Tumblr should soon have some gifs of the ragdoll physics when you crash. OH! One last thing - I also found out today that the dirt which bikes throw up behind them is called "roost".