http://www.bikeforums.net/general-cy...rando-bag.html

I use a messenger bag in a 137 basket. That Swift Sugarloaf bag looks neat. The problem with my messenger bag-in-basket setup is that it's somewhat a PITA to access - unhook the elastic hold-down cord, then pull the flap up (the flap is wedged down the back side of the basket), and even then some of the outside pockets are still inaccessible without pulling the bag out of the basket. The Sugarloaf bag seems to have solved those problems.

The nice thing about my setup is that the bag serves as my general purpose bag - camera bag and airline carry on, one bag to rule them all. Plus if I need more cargo I can strap the bag tightly to my back to free up the basket.