Very popular among consumers. I think large organizations are more likely to pay someone like http://www.prolexic.com/

I have seen the folks from prolexic at work and they service/platform is impressive.

On their spare time they take down botnets: http://www.prolexic.com/knowledge-center-ddos-vulnerability-...

http://arstechnica.com/security/2012/08/ddos-take-down-manua...

Shameless plug for hackmiami, if anyone is interested in learning how its done up and close they run frequent talks/meetups locally: http://hackmiami.org/

I read this as 'prilosec.com' and was like "Yeah, if I worked for a really visible organization, I'd probably have an anti-heartburn medication habit."

Yes, but if you largely deal with non-web protocols - like git - Cloudflare's much less effective.

We have solutions that would definitely work for GitHub. :)

It is not CloudFlare, but I would be fascinated to learn some more technical detail of these attacks as I work on systems to block this type of Layer 7 attack.