At 9am this morning it was still there (and still accepting posts, it seems).
I've just checked again and the new messageboards are now in place - New Music and the like have gone.
I can see the old thread titles via the old link (
http://www.bbc.co.uk/dna/mbradio3/F2620066) but it now says "Deleted" as the messageboard title and I can't open any of the threads.
Also, contrary to what we were told, I can't open any of the old threads via "Your discussions" (though again, I can see the titles of threads where I posted).
Not good.
It's interesting that by completely removing the old boards, they have very effectively hidden the dissent over the decimation of New Music coverage on Radio 3. I bet all the complaints we sent never get displayed on the BBC Complaints web page either. Soon (hopes Roger Wright) there will be no trace that there ever WAS a programme called Mixing It, let alone all the upset caused when it ended.....