Well, I can do all the speed improvement things myself, so I'm interested in some of the weirder things. They can detect bots quite reliably because with a netw

Well, I can do all the speed improvement things myself, so I'm interested in some of the weirder things. They can detect bots quite reliably because with a network that large it's pretty damn obvious when something is crawling a site - and they can then strip out or mangle email addresses from your HTML before reaching those bots, so you can have email addresses in plaintext without having them harvested. That's a pretty imaginative solution! Another thing they can do with their size is automatically identify and react to new attacks, so when a DDOS occurs it very quickly routes the traffic away and updates its ruleset to always be protected against that attack from now on, for all sites behind them. I don't actually have any experience though as I've never used the service, this is all from their website and from talking to their staff on HN :)