I saw this a few weeks ago and was a bit surprised nobody had mentioned it up until now, so thought I would.
Very sad to see this - I know Squeak did try and sell the business, but evidently had no success, so has decided to shut down.
It says "no longer operating at this time" which gives some hope it might be temporary, but it doesn't look all that hopeful.
Shame, too, as Squeak was active on here (under the name 'blowup_boy') but hasn't posted in over a year but was very much 'one of us' as opposed to a faceless Chinese company selling cheap knock-offs.
I was intending to buy something from there in the next few months, so really disappointed - had lost count of the number of people who'd recommended Squeak as some of the other manufacturers were apparently awful (though I've had no personal experience of any of them).
Just thought I'd mention it in case others hadn't heard.