It looks like that one might be a bigger deal than the stay-mounted ones though, since you'd have to re-align your brake caliper every time. I like the looks of it though.

This might be the year I strip down my old race frame and build it back up as my hill-country commuter. I'm pretty sure I know a frame shop that can cold-set the dropouts and I think I've found a mechanic I trust to do the build. It's way more energy than I'd have to do it myself. But that rack might go on it...