I just want to see what files were modded/added/deleted between 2 arbitrary revisions. How do I do this?
Can I do this in tortoise as well?
svn log -v -rX:Y .
The -v for "verbose" switch will give you detailed output on which files were affected on that revision.
Note that "." assumes you are currently in a working copy directory, but you can also use a URL such as "http://svn.myawesomesoftwareproject.com/trunk/lib/foo.c".
This information can be found by typing "svn help log", or by reading the SVN Book, available free online. Don't forget to Read The Friendly Manual!