Jimmy has been very active here in the forums as he recently began maintaining the popular THold plugin for Cacti. He has also contributed a great deal of time and support to the community.
As an active developer for the Squirrel Mail project, he is primarily responsible for its extensible plugin architecture. Currently, he is working with Tony to develop a new cutting edge plugin architecture for the 0.9 release of Cacti. Many of the ideas floating around are guaranteed to put a huge grin on any developer's face
.Jimmy can be found on the forums with the username 'cigamit'.
-Ian