Well, here's to yet another update while I'm here in the waiting room.
Yesterday afternoon, with three days to spare, I sent off the last piece to any REU application that I needed to send off - a copy of my unofficial transcript. The REU at Texas A&M was still in need of a copy in order to declare my application complete, so I found a window of time between classes and I sent it off to College Station, TX.
Unless notified otherwise, consider the REU-applying in any form finished, completed, and done. All I truly have to do is wait for the March Madness that will be the e-mails that will arrive at my virtual doorstep, with a 'yay' or 'nay.'