It will become ever less useless over time - there are already dock menu items for the "Mark..." scripts so you can just use the dock menu instead of the confusing and untidy Entourage Scripts menu - using another application's dock menu does not change focus! It will also leave Entourage's performace alone. There is also the help menu and there will later be prefs for several things that aren't essential but interesting (such as periodic automatic filtering of unread emails so you don't necessarily have to use a rule - this will only categorize, not move, the junk mail; you might also be able to change the balance between recall and precision, which at the moment is completely on the side of precision; etc.).
Also, even though commonly criticism is along the lines of "a user might accidentily quit the application", it might be useful to be able to quickly quit an application that is necessarily as memory-intensive as a junk filter (dictionaries of hundreds of thousands of token mappings...).
It's sensible for testing purposes, but I might change that.