kaled - 2:19 pm on Dec 14, 2010 (gmt 0)
This is an interesting question. Logically, I can certainly see that a search engine might value links that open in the same window more highly than links that open in a new window.
However, I have always operated a policy that outbound links open in a new window and I think a lot of people do the same.
On a side note - I would like to see browsers use a different cursor for links that open in a new window.