$20 PayPal Pledge
You'll get the released game, to download from Steam, playable on PC, Mac or Linux. As well as the Steam version, you will be offered a DRM-free, caffeine free, gluten free, born free non-Steam version of the PC game to download. This version will have no Steamworks functionality and will support single player and LAN multiplayer only.
I wish they'd actually make the badass weapons (spikes, blades, whatever) on the cars do something rather than just be decorations. Right now what i'm seeing on that video is gameplay exactly the same as the original and graphics that look like a playstation 2 game.
There was a video on the backers website that showed the spikes on the eagle rotating with the pedestrians getting shredded by it and thrown over the top of the car. Will try and dig it out.
The video I've linked above is the very early alpha version (hence work in progress!), still, I'm not going to complain if the gameplay/handling is the same as the original. It was brilliant.