To dump some MySQL databases in a binary-safe way:
mysqldump -uroot -p -hdbhost \ --skip-extended-insert \ --default-character-set=binary \ --databases dbonedbtwodbthree \ --add-drop-database --master-data=2 | gzip > /tmp/dump.sql.gz
Replace --master-data=2 with --lock-all-tables if dumping from a slave, and record the output of SHOW SLAVE STATUS while everything is locked.
To import this dump:
zcat /tmp/dump.sql.gz | mysql -uroot -p -hotherdbhost \ --unbuffered --batch --default-character-set=binary
To set up replication:
Use the Relay_Master_Log_File:Exec_Master_Log_Pos values from SHOW SLAVE STATUS that you recorded. See this page for explanation:
http://www.mysqlperformanceblog.com/2008/07/07/how-show-slave-status-relates-to-change-master-to/
For example:
CHANGE MASTER TO MASTER_HOST = 'abc123.dklfjalddkj.com', MASTER_USER = 'rep', MASTER_PASSWORD = 'CHANGEME', MASTER_LOG_FILE = 'abc123-bin.003292', MASTER_LOG_POS = 283072761;