Currently, my IIS log entries are written when each request completes, eg:
2012-02-15 00:31:50 W3SVC1 MACHINENAME ::1 POST ... 202 (milliseconds)
Unfortunately, sometimes requests hang or don't result in a response, due to bugs in the ASP.NET code. These don't get included in that log. I know I can probably use Failed Request Tracing for some of these scenarios, but it would be good to have these requests shown in the standard IIS log as well.