February 2nd, 2012 
Alain 
SharePoint offers a large variety of webservices and consuming such a webservice with PowerShell takes only a few lines of code:
$SPService = New-WebServiceProxy -Uri ($WebUrl + "/_vti_bin/SomeWebService.asmx?WDSL") -UseDefaultCredential $SPService.SomeMethod()
You can use PowerShell to enumerate all SharePoint groups and save them to a CSV-file without logging in to the SharePoint server.
November 29th, 2011 Alain 
You can use Powershell to upload files to a SharePoint document library. Let’s say some application is generating reports in C:\Reports and you want to periodically upload them to a document library Shared Documents. By sheduling a PowerShell script and uploading all files in a certain directory to SharePoint you can access of all your important reports via SharePoint.
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