Robert_Charlton - 8:40 pm on Jun 1, 2010 (gmt 0)
...will incoming links that are redirected to the new 301 url still pass the same (or about the same) link juice?
In my experience, about the same, depending on your definition of "about", though it can take a while to regain rankings.
From the Eric Enge follow-up to his interview with Matt Cutts [stonetemple.com]....
9. Matt Cutts: re: link juice loss in the case of a domain change: "...I am not 100 percent sure whether the crawling and indexing team has implemented that sort of natural PageRank decay."
Eric Enge comment: In a follow on email, Matt confirmed that this is in fact the case. There is some loss of PR through a 301.