PowerShell cmdlet to facilitate downloading files

Download-File.ps1

function Download-File {
    param(
        [Parameter(Mandatory=$true, Position = 0)][string]$Uri,
        [Parameter(Mandatory=$false, Position = 1)][string]$SaveAs
    )
    $loc = [System.IO.Path]::GetFullPath([System.IO.Path]::GetFileName($Uri))
    if ($SaveAs) { $loc = [System.IO.Path]::GetFullPath($SaveAs) }
    $wc = New-Object System.Net.WebClient
    $wc.UseDefaultCredentials = $true
    # I just need to add in proper proxy support
    $wc.DownloadFile($Uri, $loc)    
}