Google has now publicly partnered with CloudFlare. While there appears to be no direct SEO ramifications contained in their press release and no obvious mention of data sharing it's worth bearing in mind for anyone using CloudFlare to mask bulk hosting packages and avoid nameserver footprints. To read the full press release just google 'Cloudflare and Google partner'. While there's probably nothing to worry about at this point, it's something worth bearing in mind. Ironically this post is on the first page of Google for the term 'Cloudflare and Google partner'.