Gripshift Custom Tracks

I was wondering if there are any decent places on the net where you can download and upload custom tracks for Gripshift?

I've only recently just started playing this game, it's quite fun. I haven't had much chance yet to create any tracks though. If you have one you could post it here. Just zip it and click Manage Attachments when posting to upload it. And/or if you want I could post it on my site so others can d/l there too. There are a bunch of tracks on the Official Site