I received my phone call tonight while I was out to dinner with my boyfriend - and missed it! I called back as soon as I saw I had missed a call, thinking it was the manager of the place I had applied for a few hours earlier. I felt like (and probably sounded like) a goober when I realized it was actually the other!
The sister officially extended the bid - and I immediately accepted. This place and these girls feel like the place I imagined when I thought of sororities in the past, and I and my family all have strong personal ties to the associated philanthropy. While all of the other sororities are great in their own way, I could not imagine one fitting as well as this one.
I am sure you guys are interested in which one it is after these last few weeks. That sorority would be:
Alpha Delta Pi. 
For privacy reasons, I will only release the chapter name via PM, but there is not a way I could be more excited to be a part of this wonderful, new family! Thank you guys again for all of the encouragement and advice. I have appreciated it greatly!