Maintenance on weekends going until 8AM is normal. From what I've seen for past years, if maintenance ends at 6AM and is only for GRFP then it means it's results. Here's a spreadsheet with dates and such going back a while: https://docs.google.com/spreadsheets/d/1nx-YdXJpUkvO8FvsB8hXMgIq1HViLBQ1D-9yP-Xs010/edit?usp=sharing Maybe this means we'll get results next week? I'm hoping sooner rather than later.
I'm curious about that too, although I haven't gotten in anywhere. I applied under Astronomy & Astrophysics but my top choice program is in Earth & Planetary Sciences. Maybe that's something we'd have to ask NSF folks about when we get the GRFP.