Screwed these L-brackets (each half measures 3/8" x 1 1/2") behind the Nashbar front rack fitting and they make a perfect slot for the Ortlieb Front Roller Classic (these have the QL1 fitting, new QL2 on the FR Plus may have a longer reach); I got the Classic because the newer model isn't available in yellow.
The panniers are a revelation in car-free life. It's a huge difference vs. hooking a backpack over the handlebars, letting it rest on the rack and lashing up any loose ends. I'm stunned at how stable the panniers are. I'd gotten used to the twitchy bars, but without weight hanging on them, the Swift is a dream. As a bonus, when the panniers are rolled closed, the tops are level with the rack, making an extra wide platform for bungee loads.
The Ortliebs are better than expected (and my expectations were pretty high), just a dream piece of equipment.
Nashbar front rack ($7.99!)
L-brackets, $0.50 each, local hardware store
Ortlieb Front Roller Classic, $117 shipped from Wayne at thetouringstore.com, best price, great service.