This looks like a fantastic project, and I'm looking forward to making whatever contributions I can. To begin I installed the recently released OSMTrack iPhone application and took a drive north out of town on US Highway 95.

Looking over the map of Las Vegas I noticed a gap in the rendering of US 95 around the military town of Mercury. I don't know if there are traces for that portion yet, but as my username may hint at I love to drive and often drive a large loop around the Spring Mountains, a route that includes the missing portion of highway. As a test I fired up OSMTrack and did the drive starting my trace as I entered US 95 from Durango Avenue. I stopped the trace as I approached home and uploaded the file from my phone.

Logging in to my account at the desktop I see the trace successfully uploaded - excellent! Tomorrow I'll see what it takes to use my first trace to complete the missing portion of highway.