I am happy to report that Cat is warming up to us! Today is one week since we got her, and last night she showed great promise. The entire week she has been laying in her new spot - a low section of our bookshelf, beneath the desk. She comes out and asks for food and whatnot, but that's where she stays. She lets us pet her, but doesn't come when we call or get too close.
Well, last night Boyfriend was out with friends from work and it was just Cat and me. She actually jumped up onto the couch and watched the presidential debate and "Harry Potter and the Chamber of Secrets" with me! Once she got used to lying on the top of the couch, she continued to do it, jumping on my head as a sort of boost. She even showed up on our bed last night when we were going to sleep, though she didn't stay for long. These are all super signs that she is feeling more comfortable, and I couldn't be happier.