Thanks all! Monday is doubtful: gotta work, and geek.
I mailed in an order to Springfield for five 20-round magazines using the coupon / order form that came with the rifle, and just (5 minutes ago) ordered two more from Cheaper Than Dirt. If Springfield doesn't come through, it's good to know other sources are coming back online.
I think I'm going to be at Ommelanden tomorrow morning when they open up.