I think I'm the only person posting in this thread considering Penn State, so this may not be helpful to anyone else. A professor called me, said that I seemed like a great match for the program, talked about upcoming research opportunities, and mentioned that he was seeking out funding for me. We chatted for a bit, and the tenor of the conversation was, "We want you to come here," so I'm interpreting this as a very likely acceptance to Penn State. The professor whom I mentioned in my application was the one to call me, so in case anyone else does happen to be waiting on PSU, it could be a matter of professors getting around to making calls. The conversation had more to do with funding, which could also be why I received a call without an offer.