Allan - I've tried this but after selecting all I get the following (see below), so the question then was how to identify any files in the project that require versioning and arranging for them to be added prior to the commit. I'm still interested in a combining feature that allows me to both ADD and COMMIT in one hit however (like I had on Windows with Tortoise)
... svn: Commit failed (details follow): svn: '/Users/greg/source/topdonator/doc/testonly.rb' is not under version control
Any file/folders not currently in the repository will appear in the commit window with a question mark. To add those files, go to the 'Modify' popup menu in the table -- on the same line as the file to be added -- and select 'Add'. Then make sure those files are checked.
Also, I usually just like to select the root folder of my project and select "Status" from the SVN bundle menu. You'll get add buttons for things that aren't versioned, and you can just hit the commit button when it looks like you're going to do everything you want to.
-steve