gosuri/aws-rds-cookbook — pull request #4 by namtzigla (2014-01-29 05:13:01+00:00)
Title: fixed the db_subnet_group_name param 

There was a param spelling error db_parameter_group_name instead of db_subnet_group_name and the vpc instances where not created.
Also I added the placeholder for update instance in rds.rb (I'm planning to implement it)