gn_wendy - 8:54 am on Apr 27, 2010 (gmt 0)

Is there some ranking disadvantage in a keyword URL having a backslash or not ?

Did you mean backslash as in "\" or did you really mean a slash "/"

offtopic
i only ask because: every time you say backslash as part of a web address - steven dies a little
[xkcd.com...] (@mod: sry if link inappropriate - but i am confused on what the policy is)
/offtopic

if we are talking about trailing vs non-trailing slashes I have seen zero difference - as long as you redirect to the same page and do so consistently.