Well isn't this a thing. I have a Bloxx appliance at the school who's network I manage, and we signed a new three-year contract with them over the summer. Nothing was mentioned about any possible acquisitions (although they may have not known back then, not sure). First I heard of this was a phone call ten minutes after getting into the office this morning from a Smoothwall sales rep doing some scaremongering.
Maybe not the worse thing to happen. In my experience their appliances are good, not great, but good, and I very nearly switched filtering providers before renewing with Bloxx. Whilst their boxes aren't the greatest, I always found their support excellent, much better than anybody else I've had to deal with, and that's what got my business.
Shame to see one of the UK firms go under.
AC as I too work in the industry.