I've just integrated it with my pet project at varten.com. It's a very smooth experience, and data points started to show up on the Cloudflare dashboard within a few minutes.
One minor downside: it doesn't work on clients with JavaScript turned off.
Thanks! If you do end up "orange clouding" and proxying your site through Cloudflare, we can show you lots of stats about your website, even from clients that don't support JS :)
I occasionally spend time going through the analytics section inside the dashboard. I suppose those are data points gathered by your edge servers (?). If true - how is that different from what is launched today?