In CakePHP 2 I use @ichikaway's MongoDB plugin like this:
public $default = array(
'datasource' => 'mongodb.mongodbSource',
'database' => 'mydbname',
'host' => 'host.mongohq.com',
'port' => 27018,
'login' => 'username',
'password' => 'secret'
);
I have placed it in plugins/mongodb yet Cake can not find it and thus can not connect. What am I doing wrong?