Build time, spoken.

& {
    "Build completed in "
    'Days', 'Hours', 'Minutes' | % { if ($elapsed.($_) -gt 0) { "$($elapsed.($_)) $_, " } }
    "$($elapsed.Seconds) seconds and $($elapsed.Milliseconds) milliseconds."
} | Join-String | Out-Speech

# Thank you PowerShell and PSCX (http://pscx.codeplex.com/).