Most of the time I'm working on multiple projects at the same time. This means many svn working directories. And sometimes its essential to commit a similar file across all working dirs. Here is quick commandline to get it done (for README files).
find ./ | grep README | grep -v svn | sed "s/^/svn status /" | sh | sed "s/^M *\(.*\)/svn commit \1 -m 'updating project readme'/"