Instant logging: Harness the power of log4j with Jabber:

“Not only is logging an important element in
development and testing cycles — providing crucial debugging
information — it is also useful for detecting bugs once a system
has been deployed in a production environment, providing precise
context information to fix them. In this article, Ruth Zamorano and
Rafael Luque, cofounders of Orange Soft, a Spain-based software
company specializing in object-oriented technologies, server-side
Java platform, and Web content accessibility, explain how to use
the extension ability of log4j to enable your distributed Java
applications to be monitored by instant messaging
(IM).”