I’ve taken the time to rewrite my own central error tracking mechanism from scratch. This module includes text logs that automatically rotate themselves once a file reaches a certain size (no more trying to have someone email you a 3 GB text file), useful information about what type of error occurred, and a SQL CE database that stores these errors in a local database, counting the number of incidences and whether there is fresh information to report on a schedule to the central database.

There is also a central web service that accepts these exception reporting requests and inserts them into a central SQL database for you to do with what you will (ASP website, Excel sheets with queries, etc., etc.). You can find a copy of this solution (Visual Studio 2005 written in C#) here.