John, are you using biblatex (I remember you were trying it out)? If so, you can remove the url with a single line in your preamble:
\DeclareFieldFormat{url}{}
Notice, however, that this will may preempt the urls you do want from being
printed (---> if you have online only sources and you put their url in a
filed called "url"). In that case I am afraid manual editing is
unavoiadable---unless you want to hack the biblatex style, that is.
Cheers,
Stefano
