@Dave Doyle - if you're smart enough to use patches, you're smart enough to wrangle SVN. SVN can give you arbitrary diffs between any release or revision of WordPress, compare it to your local version, allow one-click reversions and updates, and you can browse it visually and even download diffs of any file or changeset on the WordPress Trac. It also works great with binary files, something patches really can't. Any patches we provided would be inferior to what you could get yourself via SVN, so if that's important to you I would recommend diving into it. There's a fantastic free book on SVN available here:

http://svnbook.red-bean.com/