You can find my personal website, which has lots more info, at http://www.markroseman.com
I've been an active Tcl user and member of the Tcl community since 1993 (actually earlier if you count that I was using BYO to prototype GUI's before that!), and have been involved with several of the workshops and conferences (including co-chairing the 1996 one).
I used to do some work with MacTcl, but unfortunately haven't been active in that for a couple of years. But, I just bought a new iBook, and am really looking forward to getting back into MacTcl big time!
Most of my work has been in using Tcl for collaborative systems, starting with an academic groupware toolkit called GroupKit, and later the TeamWave family of products developed at TeamWave Software, the company I founded.
I left TeamWave (well, the company that acquired TeamWave a year ago) in April 2002 and am doing some more independent stuff now. Most of my energy is going into a new Wiki-like system called CourseForum.
If you have any interesting projects you need help on, please get in touch. My personal web site has more information.
I'm tagging my comments with MR in the wiki
Mark