更新しました:-)

PrivatePortfile/Senna-MySQL5 - MacPortsWiki-JP
http://lapangan.net/darwinports/index.php?PrivatePortfile%2FSenna-MySQL5

port variants mysql5

universal
darwin_8
server: Create a startupitem to start/stop the server
innodb: Enable the InnoDB 
federated: Enable the MySQL Federated Storage Engine
archive: Enable the Archive Storage Engine 
blackhole: Enable the Blackhole Storage Engine 
csv: Enable the CSV Storage Engine
utf8: Set default charset to UTF-8
ujis: Set default charset to ujis (EUC-JP)
all_charsets: Enable all extra charsets
senna: Apply Tritonn patch (enables Japanese full-text search by Senna)

こっそり細かく指定できるようにしました。