Using find and xargs
Deleting
find /path -type f -print0 | xargs -0 rm
Moving
find /path -name "*.foo" -print0 | xargs -0 -I xxx mv xxx /var/tmp
Probably a good idea to test your command first:
find /path -name "*.foo"
Delete all .svn directories
find . -type d -name '.svn' -print0 | xargs -0 rm -rf