Prior to an implementation, I have been in the habit of making a copy of all my ssis packages. While they do exist in source control, it is far easier to recover from a local copy. If you have ever tried edit a prior version of a package from TFS, you'll know what I mean. (TFS likes to download the latest copy on check out.) This is like a backup for SSIS packages.
Below is a script that utilizes an extension for powershell that can be found here: http://sqlpsx.codeplex.com/
This could be accomplished by calling DTUTIL, but this syntax is much nicer.
$TargetFolder = "c:\temp\ssis_Packages"
$Server = "localhost
#Get packages from ETL Folder
$Packages = Get-ISItem -topLevelFolder
#Delete files from release folder
New-Item -path "$TargetFolder"
#Add Packages to release folder
+ $pack.name + ".dtsx"
Labels: Powershell, SSIS