Snow White. I haven't seen much of Bones but her character on the show is just like Snow, and Emily herself reminds me a lot of her, looks-wise (she's pretty and pale enough) and exudes the sophistication Snow always has.
Rose Red. My original choice was Rose McGowan, who would play Rose's wild, bratty self perfectly, but she got way too much Botox and just looks terrible now, especially for someone who's supposed to stay eternally young-looking. So I finally realized who that girl from Gran Torino reminded me of, and she can play bratty people too, so why not Dreama?
David Gallagher from 7th Heaven (and the stoner music guy from Super 8). He was extremely hard to think of. Actually I didn't even think of him; someone from a Fables forum suggested him and he's perfect. Manly but still a lot of boyishness to him, exactly like Blue. It probably doesn't hurt that we all envision him as the little boy Simon from the show either.
Geppetto. The very best choice. If you've seen him as the dictator V For Vendetta and the wise father in Hellboy you should agree. I could also settle for Christopher Walken, but John is just so much better and Christopher would seem almost humorous.
Briar Rose (the Sleeping Beauty). Keri has the right, classy, obvious but not glamorous kind of beauty needed for Briar, and for some reason her voice matches how I imagined Briar's. I considered Camilla Belle, but she's young, and honestly Keri just has a better look for it.
I have 3 choices for Lumi the Snow Queen: Karen, Doutzen, and Ali. All 3 remind me of ice queens, but Karen is the most regal-looking, Doutzen the more ethereal-looking, and Ali the coldest-looking (and her coloring is much cooler than the other 2's, who are warmer, so it would work better).