I'm always looking for ways to improve things so I'm open to all suggestions.
EDIT: A couple of clarifications.
1) This isn't just for adblock. Your hosts file is useful for thwarting all sorts of malware. If a bot or trojan phones home with a domain, a vigilant hosts file will block it. A if a bot or trojan phones home with an IP, then the hosts file can't help you but, then again, an IP can be physically located fairly quickly.
2) The key to a good hosts file is keeping it current. This hosts file amalgamates several well-curated sources. So your hosts file is only as good as your ability to keep it current. This repo helps with this.