gistfile1.rb

require 'growl'

module Jekyll
  class GrowlPreHook < Hook
    safe false
    sequence :pre
    
    def run(site)
      Growl.notify 'Building...', :title => 'Jekyll'
    end
  end
  
  class GrowlPostHook < Hook
    safe false
    sequence :post
    
    def run(site)
      Growl.notify 'Build complete', :title => 'Jekyll'
    end
  end
end

TODO: Modify for pushover notifications