README.md in elasticity-2.2 vs README.md in elasticity-2.3

@@ -68,14 +68,14 @@
 ```
 
 If you want to access a job flow that's already running:
 
 ```ruby
-jobflow = Elasticity::JobFlow.from_jobflow_id('AWS access key', 'AWS secret key', 'jobflow ID')
+jobflow = Elasticity::JobFlow.from_jobflow_id('AWS access key', 'AWS secret key', 'jobflow ID', 'region')
 ```
 
-This is useful if you'd like to attach to a running job flow and add more steps, etc.
+This is useful if you'd like to attach to a running job flow and add more steps, etc.  The ```region``` parameter is necessary because job flows are only accessible from the the API when you connect to the same endpoint that created them (e.g. us-west-1).  If you don't specify the ```region``` parameter, us-east-1 is assumed.
 
 ## 2 - Specifying Job Flow Options
 
 Configuration job flow options, shown below with default values.  Note that these defaults are subject to change - they are reasonable defaults at the time(s) I work on them (e.g. the latest version of Hadoop).
 
@@ -88,9 +88,10 @@
 jobflow.ec2_subnet_id                     = nil
 jobflow.hadoop_version                    = '0.20.205'
 jobflow.keep_job_flow_alive_when_no_steps = true
 jobflow.log_uri                           = nil
 jobflow.name                              = 'Elasticity Job Flow'
+jobflow.placement                         = 'us-east-1a'
 jobflow.instance_count                    = 2
 jobflow.master_instance_type              = 'm1.small'
 jobflow.slave_instance_type               = 'm1.small'
 ```