See Volker's unencrypted explanation of Lotus Expeditor here.
Pre-conference [DNUG] day is over, today is the first day of the show. At first I did not plan to come, now I am very happy I did. The reason is, that I finally understand what Lotus Expeditor really is, and what happens to all the Workplace piece parts. And now that I did not hear it after it went through the IBM Department of Marketing Encryption, it all makes perfect sense.