Sam has a couple posts outlining some of the great fun we had this past week.
I’ll leave all the gory details to Sam. However, I would recommend you take a look at the Exception Handling and Logging Blocks within Enterprise Library (and all the other blocks for that matter) if you haven’t done so recently. Before this past week it had been a while since I looked at EntLib. After spending a day working with the Logging and Exception Handling block along with a couple hours of investigation earlier in the week I have to say it is a very nice framework for ensuring your applications are properly instrumented and all your exceptions are handled appropriately (based on policy).