I'm using the Single Event view menu item which is giving my events a nice short URL which, it seems, is followed perfectly by most links ES creates on the activity stream, events listings, etc (eg mysite.com/thisevent)
I've noticed 2 places though where this URL routing isn't being followed (which presumably will then mean I loose any modules I've assigned to appear on my menu item, and probably gets a thumbs down from Google too for duplicate content)...
1. When logged in, user has a list of his / her created events in their sidebar.
2. In the Search results (this URL is a combination of the short URL plus, for example, /item/10-)