for i in `svn status | awk '{if ($1 == "?") print $2}'`; do svn add $i; done

http://www.shell-fu.org/lister.php?id=562

Sometimes, you want to add a lot of files to SVN from the command line. This simple command will find all unversioned files in an SVN checkout and adds them to SVN versioning.

Version all unversioned files in an SVN checkout

Bash