http://www.timeout.com/film/news/1204.html
"Dawn French and Jennifer Saunders will voice eccentric neighbours Miss Forcible and Miss Spink in the stop-motion feature."
and furthermore,
Based on the Neil Gaiman book, Henry Selick ('The Nightmare Before Christmas') is directing, and he told Screen Daily this about the announcement: 'I'd like to say that casting [French and Saunders] was my idea, but the credit goes to Coraline's creative father, Neil Gaiman.
'Spink and Forcible are not the usual comic relief characters of animated films, but as performed by French and Saunders, they will be morbidly funny.'
Actually it was Dawn's idea -- she did the UK version of the Audio Book of Coraline, and afterward she asked me what I thought about her and Jennifer making a film of Coraline. I had to tell her that Henry Selick already had the rights, but then suggested to Henry that Dawn and Jennifer would be a wonderful Spink and Forcible. I'm very happy that it's going to happen.
Maddy would like me to mention that we just watched the Dr Who episode The Idiot's Lantern. I thought it was much better than the Cybermen story, in the same sort of way that a mild case of athlete's foot is much better than gangrene, but I have hopes for the upcoming two-parter...
...
Almost forgot. I just got an email letting me know that the Fabulist has persuaded the powers that be at Dancing Ferret records to release the Future Bible Heroes track from the Where's Neil When You Need Him? CD. Do you want to hear a Stephin Merritt Mr Punch song? Do you want to hear Claudia Gonson pretend to be Angela Lansbury in Sweeney Todd? What about hearing a demonic Mr Punch singing along? You do? Well, click on http://www.fabulist.org/archives/2006/06/future_bible_he.html
Incidentally, they sent me some of the CDs. They are black. Not silver. It's really cool and faintly offputting.