After carefully reading the admissions guidelines, I am under the impression that Rush accepts applicants with ADs or BSNs as long as they are attractive candidates i.e. good GRE scores, references, experience, etc. The anesthesia program is an MSN program that will be transitioning to the DNP around 2013 or so. The clinical situation is described in the following quote from the website:
Most student clinical experience occurs at Rush University Medical Center, where there are over 40 anesthetizing locations. Students also rotate to Rush-North Shore Medical Center in Skokie, Illinois; Holy Family Hospital in Des Plaines, Illinois; Rush-Oak Park Hospital, in Oak Park, Illinois; MacNeal Memorial Hospital in Berwyn, Illinois; John H. Stroger Hospital of Cook County, Chicago, Illinois and the Rush Surgical Center. The Rush University Simulation Lab and its resources are used across the nurse anesthesia curriculum to provide valuable pre-clinical and crisis management skills.
Rush has a very reputable program and is known to train their students for success right out of the gates (some graduates even have shortened orientations at their first jobs because they are seen as incredibly competent for being a newby) by being very demanding during the residency. According to the Program Director and Assistant director, every year they receive calls recruiting their graduates. I liked the sound of that for sure!
All in all it was the best fit for me, and I encourage you to see if it's what you want in a school/program. All the best...