diff --git a/README.md b/README.md
index 47428c6..5dbecac 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,10 @@ This starts a server on localhost:8080. Hack away.
 
 Prett simple DSL:
 
+### `append_path`
+
+Add a load path to Sprockets.
+
 ### `middleware`
 
 Define a middleware stack.
@@ -27,5 +31,6 @@ This is the guts of a `Sinatra::Base` app.
 
 ### `compile`
 
-A list of files to compile with `sprockets-assistant compile`.
+A list of files to compile with `sprockets-assistant compile`. YUI compressor is used to make the
+JS files really small.
 
diff --git a/lib/sprockets/assistant/app_builder.rb b/lib/sprockets/assistant/app_builder.rb
index e2d2007..4bf6bbe 100644
--- a/lib/sprockets/assistant/app_builder.rb
+++ b/lib/sprockets/assistant/app_builder.rb
@@ -8,10 +8,18 @@ module Sprockets
     class AppBuilder
       ASSISTANT_CONFIG_FILE = Pathname('assistant_config.rb')
 
+      attr_reader :paths
+
       def initialize
+        @paths = []
+
         instance_eval(ASSISTANT_CONFIG_FILE.read)
       end
 
+      def append_path(path)
+        @paths << path
+      end
+
       def app(&block)
         if block
           @app = block
@@ -42,7 +50,7 @@ module Sprockets
         if block
           @compile = block
         else
-          Compiler.new(@compile).compile
+          Compiler.new(@compile).compile(@paths)
         end
       end
     end
diff --git a/lib/sprockets/assistant/cli.rb b/lib/sprockets/assistant/cli.rb
index 6653f81..2e67f7a 100644
--- a/lib/sprockets/assistant/cli.rb
+++ b/lib/sprockets/assistant/cli.rb
@@ -8,10 +8,13 @@ module Sprockets
       source_root File.expand_path('../../../..', __FILE__)
 
       desc "server", "server"
+      method_options %w{port -p} => 8080
       def server
         require 'sprockets/assistant/server'
 
-        Rack::Handler.default.run(Sprockets::Assistant::Server.app)
+        $stdout.sync = true
+
+        Rack::Handler.default.run(Sprockets::Assistant::Server.app, :Port => options[:port])
       end
 
       desc "compile", "compile things"
diff --git a/lib/sprockets/assistant/compiler.rb b/lib/sprockets/assistant/compiler.rb
index 3e48018..94a4622 100644
--- a/lib/sprockets/assistant/compiler.rb
+++ b/lib/sprockets/assistant/compiler.rb
@@ -4,6 +4,7 @@ require 'pathname'
 require 'sprockets/assistant/output'
 require 'sprockets-sass'
 require 'sprockets/assistant/compass'
+require 'yui/compressor'
 
 module Sprockets
   module Assistant
@@ -17,7 +18,7 @@ module Sprockets
         @target = DEFAULT_TARGET
       end
 
-      def compile
+      def compile(paths)
         ::Compass.configuration do |c|
           c.output_style = :compressed
         end
@@ -26,6 +27,8 @@ module Sprockets
         @env.append_path('assets/javascripts')
         @env.append_path('assets/stylesheets')
 
+        paths.each { |path| @env.append_path(path) }
+
         instance_eval(&@settings)
       end
 
@@ -33,8 +36,18 @@ module Sprockets
         file_target = target.join(name)
         say "#{name} => #{file_target}"
 
+        js_compressor = YUI::JavaScriptCompressor.new(:munge => true)
+
         file_target.parent.mkpath
-        target.join(name).open('w') { |fh| fh.print @env[name].to_s }
+        target.join(name).open('w') { |fh|
+          output = @env[name].to_s
+
+          if File.extname(name) == '.js'
+            output = js_compressor.compress(output)
+          end
+
+          fh.print output
+        }
       end
 
       def target
diff --git a/lib/sprockets/assistant/server.rb b/lib/sprockets/assistant/server.rb
index 5447704..4f91ba5 100644
--- a/lib/sprockets/assistant/server.rb
+++ b/lib/sprockets/assistant/server.rb
@@ -29,7 +29,9 @@ module Sprockets
           instance_eval(&_app_builder.middleware)
 
           map "/#{Sinatra::Sprockets.config.prefix}" do
-            run Sinatra::Sprockets.environment
+            env = Sinatra::Sprockets.environment
+            _app_builder.paths.each { |path| env.append_path(path) }
+            run env
           end
 
           run _app
diff --git a/sprockets-assistant.gemspec b/sprockets-assistant.gemspec
index 4770c82..b83b86f 100644
--- a/sprockets-assistant.gemspec
+++ b/sprockets-assistant.gemspec
@@ -23,5 +23,6 @@ Gem::Specification.new do |gem|
   gem.add_dependency 'compass'
   gem.add_dependency 'sprockets-vendor_gems'
   gem.add_dependency 'sprockets-sass'
+  gem.add_dependency 'yui-compressor'
 end