Learned Tcl in 2002.
Primarily a server-side Java programmer; Tcl is for fun and to learn to think in different ways.
http://www.michaelwax.com - my personal site
http://www.programmingtoolkit.com - programming resources
http://www.patterntoolkit.com - neural network, genetic algorithm, and other pattern recognition stuff; bibliography on gene expression
http://www.practicalstudies.com - the most boring URL in the world