Zipcar had been trying to move off Tcl, but I don't know how seriously they were focused on that or what their status is. My impression is that had much more to do with trouble finding experienced devs than any issues with the technology stack, though.
I'm a big Tcl fan, and had a hand in the most recent version of Ousterhout's book, but it's a bit of a surprise that they picked Tcl, as it's honestly not that popular these days. Wonder who it was that made that decision.
If nothing else, sounds like round 26339132 of the Tcl marketing "fail": company complains about not finding people, while simultaneously hiding themselves from the community of the product they're using, and hiding the fact that they're using the technology in question.
