I work for the University of Hawaii, and have used Tcl for astronomical instrumentation systems. Mainly for GUI's. Here is the observartory web page: [L1 ]
Here's a live view of Haleakala Crater: [L2 ]
I also have my own part time business, Koa Software, [L3 ] but I haven't gotten rich yet.
I am interested in using Tcl/Tk for new types of applications. I ended up on this page out of curiosity because it was a Hawaiian word, but I am really impressed with wikiwiki and am going to try and use it at work.