I came across a great free tour HUD at Idea City (developed by real world advertising agency GSD&M headquartered in Austin, TX).



The HUD is very easy to use. Horizontally, it can be expanded to show all locations on the tour or collapsed to show only the current location. It can also be minimized vertically and completely reskinned if you want to change its colors.



They offer two separate tours, one that focuses on real world businesses in Second Life and another that highlights some unique aspects of Second Life culture. Because the HUD comes with full permissions, anyone can make and easily share their own tour.