I've been using Tcl fairly quietly since 1998, but am now slowly 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'll be giving a talk on Sharpen at the Fifth European Tcl/Tk Users Meeting - see http://www.t-ide.com/tcl2005e/abstracts.html#6 for a preliminary outline.