Sphinx, I would definitely start blocking off the old roost to force her to go elsewhere. She'll probably roost outside the coop somewhere for the first couple of nights. I had that happen with some of my birds. Every so often, I still need to put one or two of them away because they're in the bushes.
Madchicken, oh my gosh, that baby is so cute! Congrats on having one out already! Man, that went fast.
So after discussing my lack-of-egg woes with my BF, he suggested that maybe my girls need more light to help them to lay right now. I don't want to rig up light out in the coop, but what I'll do is put a large cage in the garage where I can have artificial light, then pen two girls at a time to see who's laying (and what they lay) I'm kind of excited for this experiment! I know exactly who I'm sticking in the layer suite first, too: my Exchequer Leghorn and my EE/Leghorn mix. After those two, I'll try putting my RIR in with someone, since I know she should be laying.