Server issues today were 100% related to an operating system upgrade (Mac OS X 10.7 Lion) gone wrong, and has absolutely nothing to do with CloudFlare. The CloudFlare pages you see are cached versions that only show when the backend servers (our servers, a Mac Mini cluster) go down. Every single CloudFlare error in the past month has been on our end—not theirs.
I think it's finally time we ditch Darwin for Windows Server 2008.