I've been using Tcl fairly quietly since 1998, but am now breaking cover, since I've been developing a product called Sharpen (http://www.passisoft.com/shqa.html ) to help reduce the costs of the "legacy" Vignette sites that use Tcl. There are still a lot of these out there.
I should be able to announce some significant sales in the very near future, lawyers permitting.
I gave a talk on Sharpen at the small but interesting Fifth European Tcl/Tk Users Meeting - the paper is online at http://www.t-ide.com/tcl2005e/6_sharpentcle2005.pdf.gz