Samo,
Thank for the pointer. I just ordered the rear traveler rack. I had a chance to stop by REI yesterday and try my Arkel Bug on the standard rack and it wouldn't fit, the rack was just a little too short. I don't think any of my panniers (Arkel Bug, Arkel Shopper, and Orlieb Backroller) would fit...
Should be purchasing the bike next week, about the time the new rack should arrive!