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 using Tcl.

I'll be giving a talk on this at the [Fifth European Tcl/Tk Users Meeting] - see 
http://www.t-ide.com/tcl2005e/abstracts.html#6 for a preliminary outline.