Powershell template

I'm working on a template for all powershell scripts in our environment. Basically something everyone can take as a starting point for their scripts, that will guarantee a level of homogeneity of functions (logging, debug level messages, email output, etc.).

Below is what I have so far. Any thoughts on improvements/additions?

##########################################################################
## Script Name    : template.ps1                                        ##
## Created        : 05/02/2008                                          ##
## Author         : John McDevitt                                       ##
## Function       : sample script to be used as a start for all scripts ##
##                : in production.                                      ##
##                :                                                     ##
## Usage          : how to call this script (e.g. arguments required or ##
##                : accepted)                                           ##
##                :                                                     ##
## Host/path      : where is this script located                        ##
##                :                                                     ##
## Notes          : Update the help message with meaningful text for    ##
##                : your script.                                        ##
##                :                                                     ##
##                : include debugging messages by calling debug_msg     ##
##                : e.g., debug_msg("about to do something weird")      ##
##                : include log messages by calling log_msg.  Log file  ##
##                : is configurable, but defaults to a scriptname.log   ##
##                : in the current directory (will be a share soon).    ##
##                : All debug messages go into the log prefaced with    ##
##                : DEBUG:                                              ##
##                :                                                     ##
##                : you will probably need to update the param block,   ##
##                : even though it is above the "your code here" block  ##
##                :                                                     ##
## Update Log     :                                                     ##
##                :                                                     ##
##########################################################################
param (
                [switch]$debug,
                [string]$mailto,
                [string]$logfile
      )

function Usage
{
    ""
    "Describe the purpose of this script"
    ""
    "Usage: template.ps1 -option <value> "
    ""
    "Required Parameters:"
    " -option <value>: Describe the options and their expected values here"
    ""
    "Optional Parameters:"
    " -mailto user@domain: User/group to send a copy of any debugging messages"
    " or log info to."
    ""
    " -debug: Enables debug messages -- useful for tracing code execution"
    ""
    " -? : Display this usage information"
    ""
    ""
    exit
}

function log_msg ($message) {
        $message >> $logfile
        if ($mailto) { $script:email_body = $script:email_body + $message + "`n" }
}

function debug_msg ($message) {
        if ($debug) {
                $message = "DEBUG: " + $message
                $message
                log_msg $message
        }
}

log_msg ("started execution at " + (get-date))

if ($logfile -eq "") {
        $logfile = $($MyInvocation.mycommand.name) + ".log"
}

debug_msg "logfile is $logfile"

##########################################################################
##              YOUR CODE BEGINS BELOW THIS LINE                        ##
##########################################################################

if (( $ARGS -eq '-?') -or ( $ARGS -match "help" )) {
        Usage
}

##########################################################################
##               YOUR CODE ENDS ABOVE THIS LINE                         ##
##########################################################################

log_msg ("completed execution at " + (get-date))
if ($mailto) {
        send-smtpmail -to $mailto -smtphost mailhost.yourdomain.com -from $mailto -subject $($MyInvocation.mycommand.name) -body $email_body
}