Should URL's end in a trailing slash?

[eluser]Colin Williams[/eluser]
It's a moot issue when using something like mod_rewrite because the server is instructed to always hit index.php, trailing slash or not. The problem with leaving off the trailing slash (without mod_rewrite doing its directing) is that the server would need to attempt a redirect to the forward-slashed path in its attempt to serve the request. And I don't think search engines put any weight into it.