[Brian]

OmniFocus presumes that something which has been dropped is something you really truly aren't going to work on. Based on that presumption, it doesn't include the contents in the completion cell, so you don't have to wade through a bunch of options you've said you don't want to work on.

The ability to set a folder to "On Hold" instead of dropping it should be coming in version 2; that sounds like it'll do what you're looking for. In current releases, though, you're going to have to un-drop the folders to get the items they contain to show up in the completion cells. Sorry.