According to The Register (who are usually right about these things), Den Automation has gone to the wall.

It's a shame - the products had a lot going for them. But I'm not surprised. Wearing my PC Pro hat I asked for review samples several times, but it seems they were afraid of the products getting mainstream attention other than places that only do 'skim the surface' reviews.

I hope someone else buys the IP, and gets the whole thing up and running again.