try latest connect-mongo with a mongostore initialization callback in

attempt to avoid the 'arbiterOnly' error

package.json

@@ -10,7 +10,7 @@
     "derby-ui-boot": "git://github.com/codeparty/derby-ui-boot#master",
     "derby-auth": "git://github.com/lefnire/derby-auth#master",
 
-    "connect-mongo": ">=0.1.9",
+    "connect-mongo": "git://github.com/kcbanner/connect-mongo#master",
     "passport-facebook": "*",
     "express": "*",
     "gzippo": "*",

src/server/index.coffee

@@ -51,6 +51,10 @@ options =
   allowPurl: true
   schema: require('../app/schema').newUserObject()
 
+# use async callback for initializing app, to make sure we're connected to the database before initting app
+# this avoids 'arbiterOnly' error (see http://goo.gl/Vs6lW)
+mongo_store = new MongoStore {url: process.env.NODE_DB_URI}, ->
+
   expressApp
     .use(express.favicon())
     # Gzip static files and serve from memory
@@ -68,7 +72,7 @@ expressApp
     .use(store.sessionMiddleware
       secret: process.env.SESSION_SECRET || 'YOUR SECRET HERE'
       cookie: {maxAge: ONE_YEAR}
-    store: new MongoStore(url: process.env.NODE_DB_URI)
+      store: mongo_store
     )
 
     # Adds req.getModel method