SharePoint List Sync

# Fill parameters here
$sourceWebUrl = "http://vm-tme-w2k8/sites/DEV/Child1/Child2"
$sourceListName = "SourceList"
$sourceKeyField = "Title"
$sourceDataField = "Body"

$targetWebUrl = "http://vm-tme-w2k8/sites/DEV/Child1/Child2"
$targetListName = "TargetList"
$targetKeyField = "Title"
$targetDataField = "Body"

# Script code.
$sourceWeb = Get-SPWeb $sourceWebUrl
Write-Host $sourceWeb
$sourceList = $sourceWeb.Lists[$sourceListName];
Write-Host $sourceList.DefaultViewUrl

$SPAssignment = Start-SPAssignment
$targetWeb = Get-SPWeb $targetWebUrl -AssignmentCollection $SPAssignment
Write-Host $targetWeb
$targetList = $targetWeb.Lists[$targetListName];
Write-Host $targetList.DefaultViewUrl

for ($sourceItemIndex = 0 ; $sourceItemIndex -lt $sourceList.ItemCount ; $sourceItemIndex++)
{
    for ($targetItemIndex = 0 ; $targetItemIndex -lt $targetList.ItemCount ; $targetItemIndex++)
    {
#$SPItem = $SPList.Items | Where { $_["Title"] -eq "New Announcement" }
        if ($sourceList.Items[$sourceItemIndex][$sourceKeyField] -eq $targetList.Items[$targetItemIndex][$targetKeyField])
        {
            $targetItem = $targetList.Items[$targetItemIndex];

            Write-Host -ForegroundColor Green "Found matching Title : "$targetItem[$targetKeyField]
            Write-Host -ForegroundColor Cyan "REPORT : Change for item '"$targetItem[$targetKeyField]"' : Value '"$targetItem[$targetDataField]"' became '"$sourceList.Items[$sourceItemIndex][$sourceDataField]"' END_REPORT"
            $targetItem[$targetDataField] = $sourceList.Items[$sourceItemIndex][$sourceDataField];
            $targetItem.SystemUpdate();
        }
    }
}

Stop-SPAssignment $SPAssignment