Here is the error handling code that I use on most of my sites.  It sends out an email to me whenever there is an error.  It also maintains the http status codes for errors like 404, which is important as it tells search engines that the url is bad and you really don't want those errors being left in the log anyways.

It would be great if you would add something like this to mojo portal.  I think too many sites on the net have problems that no one ever finds out about because they're just stuffed in a log somewhere.

public static void HandleException(Exception exception, HttpContext context)
{
HttpException httpException = exception as HttpException;
if (httpException != null && (httpException.GetHttpCode() == 405 || httpException.GetHttpCode() == 404 || httpException.GetHttpCode() == 403))
{
context.Response.StatusCode = httpException.GetHttpCode();
context.Response.SuppressContent = true;
context.Response.End();
return;
}

SmtpClient mailClient = new SmtpClient(System.Configuration.ConfigurationManager.AppSettings["MailServer"]);

StringBuilder errorMessage = new StringBuilder();

if (exception is HttpUnhandledException)
exception = exception.InnerException;

errorMessage.Append(exception.ToString());

if (httpException != null)
errorMessage.Append("\n\nHTTP EXCEPTION CODE: " + httpException.GetHttpCode());

if (exception.InnerException != null)
{
errorMessage.Append("\n\n ***INNER EXCEPTION*** \n");
errorMessage.Append(exception.InnerException.ToString());
}

if (context != null)
{
errorMessage.Append("\n\n ***REQUEST PARAMETERS*** \n");
foreach (string LName in context.Request.Params.Keys)
{
errorMessage.AppendFormat("\n{0} = {1};", LName, context.Request[LName]);
}
}

try
{
mailClient.Send
(
SiteName + " Web Server <server@server.com>",
System.Configuration.ConfigurationManager.AppSettings["ErrorEmail"],
SiteName + " Error " + Guid.NewGuid().ToString(),
errorMessage.ToString()
);
}
catch (System.Net.Mail.SmtpException)
{
}
}