What's the best way to remove all .svn directories throughout a directory hierarchy on Mac OS X?

find . -name .svn  -type d -print0 |xargs -0 rm -rf 

Just do an export from the subversion repository.

For systems that support it:

find . -name .svn -delete

or, if they don't support the -delete switch:

find . -name .svn -exec rm -rf {} \;