diff -r 7722ec70c01b -r f5297dde9053 client/js/json-serializer.js
--- a/client/js/json-serializer.js	Fri Jul 27 12:22:10 2012 +0200
+++ b/client/js/json-serializer.js	Fri Jul 27 19:15:32 2012 +0200
@@ -2,6 +2,10 @@
 
 Rkns.Serializers.BasicJson.prototype._init = function() {
     this.load(this._project._opts.url);
+    var _this = this;
+    this.save = Rkns._.throttle(function() {
+        _this._save.apply(this, Array.prototype.slice.call(arguments,0));
+    }, 2000);
 }
 
 Rkns.Serializers.BasicJson.prototype.load = function(_url) {
@@ -19,43 +23,89 @@
     var _proj = this._project;
     _proj.title = _serializedData.title || "(untitled project)";
     if (typeof _serializedData.users === "object" && _serializedData.users) {
-        _proj.users.addElements(
-            Rkns._(_serializedData.users).map(function(_data) {
-                var _userData = {
-                    id: _data.id,
-                    title: _data.title,
-                    uri: _data.uri,
-                    color: _data.color
-                };
-                return new Rkns.Model.User(_proj, _userData);
-            })
-        );
+        Rkns._(_serializedData.users).each(function(_data) {
+            var _userData = {
+                id: _data.id,
+                title: _data.title,
+                uri: _data.uri,
+                color: _data.color
+            };
+            _proj.addUser(_userData);
+        });
     }
     if (typeof _serializedData.nodes === "object" && _serializedData.nodes) {
-        _proj.nodes.addElements(
-            Rkns._(_serializedData.nodes).map(function(_data) {
-                var _nodeData = {
-                    id: _data.id,
-                    title: _data.title,
-                    uri: _data.uri,
-                    created_by: _data.created_by,
-                    position: {
-                        x: _data.position.x,
-                        y: _data.position.y
-                        //x: 800 * Math.random() - 400,
-                        //y: 600 * Math.random() - 300
-                    }
-                };
-                return new Rkns.Model.Node(_proj, _nodeData);
-            })
-        );
+        Rkns._(_serializedData.nodes).each(function(_data) {
+            var _nodeData = {
+                id: _data.id,
+                title: _data.title,
+                uri: _data.uri,
+                created_by: _data.created_by,
+                position: {
+                    x: _data.position.x,
+                    y: _data.position.y
+                }
+            };
+            _proj.addNode(_nodeData);
+        });
     }
     if (typeof _serializedData.edges === "object" && _serializedData.edges) {
-        _proj.edges.addElements(
-            Rkns._(_serializedData.edges).map(function(_data) {
-                var _edgeData = _data;
-                return new Rkns.Model.Edge(_proj, _edgeData);
-            })
-        );
+        Rkns._(_serializedData.edges).each(function(_data) {
+            var _edgeData = {
+                id: _data.id,
+                title: _data.title,
+                uri: _data.uri,
+                from: _data.from,
+                to: _data.to,
+                created_by: _data.created_by
+            };
+            _proj.addEdge(_edgeData);
+        });
     }
 }
+
+Rkns.Serializers.BasicJson.prototype.serialize = function() {
+    var _res = {
+        title: this._project.title,
+        users: this._project.users.map(function(_user) {
+            return {
+                id: _user.id,
+                title: _user.title,
+                uri: _user.uri,
+                color: _user.color
+            }
+        }),
+        nodes: this._project.nodes.map(function(_node) {
+            return {
+                id: _node.id,
+                title: _node.title,
+                uri: _node.uri,
+                created_by: _node.created_by.id,
+                position: {
+                    x: _node.position.x,
+                    y: _node.position.y
+                }
+            }
+        }),
+        edges: this._project.edges.map(function(_node) {
+            return {
+                id: _node.id,
+                title: _node.title,
+                uri: _node.uri,
+                from: _node.from.id,
+                to: _node.to.id,
+                created_by: _node.created_by.id
+            }
+        })
+    }
+    return _res;
+}
+
+Rkns.Serializers.BasicJson.prototype._save = function() {
+    var _data = this.serialize();
+    Rkns.$.post(
+        this._project._opts.url,
+        _data,
+        function(_res) {
+        }
+    );
+}