Data::Sync is a simple, pure perl based metadirectory/data pump. (Although you may need a compiler if you're using certain DBI drivers and/or Net::LDAP).
At the moment this is ALPHA software - use it with caution! I'm keen see the functionality develop further, and welcome feedback at charlesc@g0n.net
install with cpan, or do:
perl Makefile.PL
make test
make install
Obviously not everyone has LDAP, Net::LDAP & DBD::SQLite installed. The bulk of the testing is done on my dev server - the tests shipped with the module test internal functionality only.