Don't use monkeypathcing so kitties can stay alive.

lib/merb_sequel.rb

@@ -4,6 +4,8 @@
   require File.join(File.dirname(__FILE__) / "merb" / "orms" / "sequel" / "connection")
   Merb::Plugins.add_rakefiles "merb_sequel" / "merbtasks"
 
+  Sequel::Model.send(:include, Merb::Orms::Sequel::ModelExtensions)
+
   # Connects to the database and handles session
   #
   # Connects to the database and loads sequel sessions if we use them.

lib/sequel_ext/model.rb

@@ -1,7 +1,11 @@
-module Sequel
-  class Model
-    def new_record?
-      self.new?
+module Merb
+  module Orms
+    module Sequel
+      module ModelExtensions 
+        def new_record?
+          self.new?
+        end
+      end
     end
   end
-end
+end