I just finished up a prototype for a new product that I'd like to share.  It's a small, simple  duffel bag - handles, side pockets, and d-rings to attach an adjustable shoulder strap.  Oh, and some simple velcro straps at the bottom to secure it to a rear rack.

What do you think?  Don't you want one?  I'm also considering offering other attachment options such as an under-the-seat option (for those bicycles that don't have racks)  or perhaps a handlebar attachment?

scout trunk bag prototype