diff --git a/Rakefile b/Rakefile
index 9fad6b7..c5a9197 100644
--- a/Rakefile
+++ b/Rakefile
@@ -5,8 +5,8 @@ begin
   require 'jeweler'
   Jeweler::Tasks.new do |gem|
     gem.name = "noprocast"
-    gem.summary = %Q{TODO: one-line summary of your gem}
-    gem.description = %Q{TODO: longer description of your gem}
+    gem.summary = %Q{Give procastination a swift kick in the balls.}
+    gem.description = %Q{Block access to addictive websites in one command-line swoop.}
     gem.email = "rfwatson@gmail.com"
     gem.homepage = "http://github.com/rfwatson/noprocast"
     gem.authors = ["Rob Watson"]
diff --git a/bin/noprocast b/bin/noprocast
new file mode 100644
index 0000000..58e0b95
--- /dev/null
+++ b/bin/noprocast
@@ -0,0 +1,24 @@
+#!/usr/bin/env ruby
+
+require File.join(File.expand_path(File.dirname(__FILE__)), '..', 'lib', 'noprocast')
+
+begin
+	case ARGV.first
+	when 'on'
+		Noprocast.activate!
+	when 'off'
+		Noprocast.deactivate!
+	when 'status'
+		puts Noprocast.status_message
+	when 'edit'
+		if Process.uid != File.stat(Noprocast.deny_file_path).uid
+			puts "Can't edit this file as it belongs to another user (hint: don't use sudo)" 
+			exit
+		end
+		Noprocast.edit!
+	when 'help', '-h', '--help', nil
+		puts "Usage: [sudo] noprocast [on|off|status|edit]"
+	end
+rescue Errno::EACCES
+	puts "Permission denied: try sudo noprocast"
+end
diff --git a/lib/noprocast.rb b/lib/noprocast.rb
index e69de29..2be04b9 100644
--- a/lib/noprocast.rb
+++ b/lib/noprocast.rb
@@ -0,0 +1,65 @@
+require 'fileutils'
+
+class Noprocast
+	class << self
+		def default_hosts
+			['news.ycombinator.com', 'twitter.com', 'facebook.com', 'reddit.com']
+		end
+
+		def deny_file_path
+			File.expand_path("~/.noprocast")
+		end
+
+		def current_hosts
+			setup_deny_file_if_required!
+			File.read(deny_file_path).split(/\n/).map(&:strip)
+		end
+
+		def hosts_file_content
+			File.read("/etc/hosts")
+		end
+
+		def activate!
+			backup_hosts_file_if_required!
+			deactivate!   # ensure that /etc/hosts is clean
+			File.open("/etc/hosts", 'a') do |file|
+				file << "\n\n# noprocast start\n#{current_hosts.map { |host| "127.0.0.1 #{host}" }.join("\n")}\n# noprocast end"
+			end
+		end
+
+		def deactivate!
+			clean_hosts = hosts_file_content.gsub(/(\n\n)?\# noprocast start.*\# noprocast end/m, '')
+			File.open("/etc/hosts", 'w') do |file|
+				file << clean_hosts
+			end	
+		end
+
+		def active?
+			hosts_file_content.match(/\# noprocast start/)
+		end
+
+		def status_message
+			active? ? "noprocast enabled for #{current_hosts.size} hosts" : "noprocast disabled"
+		end
+
+		def backup_hosts_file_if_required!
+			unless File.exists?("/etc/.hosts.noprocastbackup")
+				FileUtils.cp("/etc/hosts", "/etc/.hosts.noprocastbackup")
+			end
+		end
+
+		def setup_deny_file_if_required!
+			unless File.exists?(deny_file_path)
+				File.open(deny_file_path, 'w') do |file|
+					file << default_hosts.join("\n")
+				end
+			end
+		end
+
+		def edit!
+			editor = ENV['EDITOR'] || 'vi'
+			system "#{editor} #{deny_file_path}"
+		end
+	end
+end
+
diff --git a/noprocast.gemspec b/noprocast.gemspec
new file mode 100644
index 0000000..91f53d3
--- /dev/null
+++ b/noprocast.gemspec
@@ -0,0 +1,56 @@
+# Generated by jeweler
+# DO NOT EDIT THIS FILE DIRECTLY
+# Instead, edit Jeweler::Tasks in Rakefile, and run the gemspec command
+# -*- encoding: utf-8 -*-
+
+Gem::Specification.new do |s|
+  s.name = %q{noprocast}
+  s.version = "0.1.0"
+
+  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
+  s.authors = ["Rob Watson"]
+  s.date = %q{2010-11-10}
+  s.default_executable = %q{noprocast}
+  s.description = %q{Block access to addictive websites in one command-line swoop.}
+  s.email = %q{rfwatson@gmail.com}
+  s.executables = ["noprocast"]
+  s.extra_rdoc_files = [
+    "LICENSE",
+     "README.rdoc"
+  ]
+  s.files = [
+    ".document",
+     ".gitignore",
+     "LICENSE",
+     "README.rdoc",
+     "Rakefile",
+     "VERSION",
+     "lib/noprocast.rb",
+     "spec/noprocast_spec.rb",
+     "spec/spec.opts",
+     "spec/spec_helper.rb"
+  ]
+  s.homepage = %q{http://github.com/rfwatson/noprocast}
+  s.rdoc_options = ["--charset=UTF-8"]
+  s.require_paths = ["lib"]
+  s.rubygems_version = %q{1.3.7}
+  s.summary = %q{Give procastination a swift kick in the balls.}
+  s.test_files = [
+    "spec/noprocast_spec.rb",
+     "spec/spec_helper.rb"
+  ]
+
+  if s.respond_to? :specification_version then
+    current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
+    s.specification_version = 3
+
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
+      s.add_development_dependency(%q<rspec>, [">= 1.2.9"])
+    else
+      s.add_dependency(%q<rspec>, [">= 1.2.9"])
+    end
+  else
+    s.add_dependency(%q<rspec>, [">= 1.2.9"])
+  end
+end
+