this swipe function to n900 is very gud. but its not fully functional on n900. for instance swiping through the homescreen opens the dashboard or menu accidently. Playing games such as fruit ninja, scrolling web pages in opera also does so.
Also i should mention that since the n900's screen edges are quit upward from the screen. so swiping through edges(left & right) in portrait mode is not gud.
thats all what i think about this concept.
A big thumbs up to the developer for creating this & hoping for a better version