As I don't have a Windows domain on my home computer, I simply use a Windows XP for illustrating how to implement a Drop-box folder on NTFS, named "Submissions" as an example. It is the exact same method for domain scenarios, except by replacing the users with corresponding domain users. The steps apply to Windows 2003, Windows 2008 and Windows 7, too.
Basically, Administrators have "Full Control" access to the folder "Submissions", Users have "List Folder Contents" and "Write" access to the folder, and CREATOR OWNER has special "Read" access to the folder. All NTFS permissions are shown in the screenshots below.
As the result, Users can list the folder, post files, and read the files they posted, but not the files of each other. Administrators can access all files with Full Control.
Permissions for Administrators
Permissions for CREATOR
Permissions for Users
Advanced Security Settings for Submissions
Detailed Permissions for Administrators - Full Control
Detailed Permissions for CREATOR - Read & Execute
Detailed Permissions for Users - Write
Detailed Permissions for Users - Read & Execute