I just learned that a pilot for Grimm has been greenlit. Behind the fairy tale/crime drama are David Greenwalt, known for Buffy the Vampire Slayer and Angel, and Jim Kouf, known for Angel. That provides me with an element of confidence in the concept. Both Buffy and Angel have some wonderful fairy tale moments - "Hush," for instance. The "Through the Looking Glass" episodes of Angel are also a good twist on fairy tale experience and I've always had a soft spot for the old Groosalugg.
I think the comments to the Inside TV article, linked above, were intriguing, though. Many brought up the resemblance to Fables and a couple of comments brought up Fforde's Nursery Crime Division. In fact, much fairy tale involves criminal activity - stolen golden eggs, kidnapped princesses, murdered grannies, con artists etc - so it makes sense that authors today are drawing on the crime element. They don't need to be copying each other - it's there in the stories.
Not to mention that fairy tale is one genre where ideas and motifs continue to be regularly recycled into new stories and retellings. That's what makes fairy tale such a brilliant field to be working in.
And now I really need a cup of coffee. I was up till 2am last night (this morning?) finalising copy edits.
(Update: i09 just posted a piece on the above news, featuring a clip from Fairy Tale Police.)