svn log has a --verbose parameter. I don't have a repository here to test with, but does that return a list of modified files?

You can also use svn diff -r <revision> to retrieve the full change details, which you can parse or read manually to find out which files were changed.

@Dana & @John

Actually, svn log -v -r <#> http://my.svn.server/repository-root will work and show you all modified files within this repository. Or if you wanted this to work from within a working copy, you could use the output of svn info | grep Repository Root or something to find the actual repository root.

--verbose is the same as -v, and those options simply list all of the affected files.