Kraftvaerk Exceptionless Package installs a log-appender for log4net that simply picks up all the errors that are being logged allready and send the exceptions to exceptionless.com
Simply install, update the key through the installation process or on the Exceptionless-tab under "Developer". Sign up at www.exceptionless.com to get your key, its free!!
Kraftvaerk Exceptionless Package is a great way to visualise the exceptions that occur on your (or your clients) website. On exceptionless.com you can see the exceptions as well as some neat statistics.
And you can even set up alerts on certain critereas. Its simply a great tool in post-launch where you want to monitor closely for something unexpected or just as a safety net for your exsising applications so that you may catch the introduction of a bug before the client does. Without having to scroll through that loooooooooooong log-file.