How can I display a SP 2010 out of the box workflow's task assignees via powershell?

Question

There are days where one of the 250+ workflows at the site has attempted to send email to someone no longer at the company.
I would like to find a way to go through the farm and display all the list URLs that have workflows, and the mail addresses associated to the workflows.
This way I can track down the workflows that need to be updated to remove the missing users.
I have started a bit of script to do this. In my script, I just had a site collection - I figured that if I can get that to work, then surely wrapping another loop for the rest of the farm won't be bad. 
However, for some reason, I am not seeing the output that I expected to show the mail addresses.
I am hoping a different set of eyes might see what I am missing. It was my understanding that the AssociationData property was XML that contained information about the assignees for tasks, the carbon copy list, etc.
Maybe I misunderstood something that I read?
$outLoc = "d:\temp\wfdata.txt"
$web = Get-SPWeb -Identity "http://myfarm/sites/it/"
foreach ($list in $web.Lists)
 $associationColl=$list.WorkflowAssociations
 foreach ($association in $associationColl)
       $association.AssociationData | Out-File $outLoc
$web.Dispose()
I want to thank you for the helpful tips that so often appear on this list. They help me when I am reading over old threads to figure out what to do. I am hoping that tips on this thread will likewise be helpful.

Answer 1

Hi,
With
SPWorkflowAssociation.AssociationData property, we can get the assignees’ information. Your script can
be able to retrieve a XML format data which contains the user name we need:
So the next step would be getting the user name by parsing the XML data we got.
The two links below will show how to parse XML with PowerShell:
http://stackoverflow.com/questions/18032147/parsing-xml-using-powershell
http://blogs.technet.com/b/heyscriptingguy/archive/2012/03/26/use-powershell-to-parse-an-xml-file-and-sort-the-data.aspx
With the user name, we can get the
Email property of an user with the scripts as the link below provided:
http://davidlozzi.com/2012/03/07/using-powershell-to-access-sharepoint-sites/  
Best regards
Patrick Liang
TechNet Community Support