shawn@indianapolis:/backup$ pfexec zfs send -rp tank@2012-06-02_0847 > tank@2012-06-02_0847.zfs
invalid option 'r'
usage:
        send [-DnPpRrv] [-[iI] snapshot] <snapshot>

For the property list, run: zfs set|get

For the delegated permission list, run: zfs allow|unallow