Retrieve the list of Content Types in MOSS 2007 using PowerShell

[void][System.Reflection.Assembly]::LoadWithPartialName("Microsoft.SharePoint") | out-null
Write-host ".."
Write-host ".."
Write-host "Get a list of Content types"
$site = new-object Microsoft.SharePoint.SPSite("http://spweb/extend"); # specify url here
foreach ($web in $site.AllWebs) { 
  $ctypes = $web.ContentTypes
  foreach ($ctype in $ctypes) {
  $usages = [Microsoft.Sharepoint.SPContentTypeUsage]::GetUsages($ctype) 
    foreach ($usage in $usages) { 
    Write-Host $web.Name + "," + $ctype.Name + "," + $usage.Url 
    } 
  }
}

$site = Get-SPSite("http://SPWeb/Site"); # Specify url here
foreach ($web in $site.AllWebs) {    
    $ctypes = $web.ContentTypes
    foreach ($ctype in $ctypes) {
        $usages = [Microsoft.Sharepoint.SPContentTypeUsage]::GetUsages($ctype)    
        foreach ($usage in $usages) {       
        Write-Host $web.Name + "," + $ctype.Name + "," + $usage.Url    
        } 
    }
}