Yea CocoaMySQL is good, I would use that if I were you.
My app development has stalled a bit, whilst I try to learn a bit more - plus, at the end of it all, it won't be a MySQL manager like the aformentioned CocoaMySQL - I hope to have an app which uses MySQL in a different way
The latest version is here http://mootymoots.me.uk/downloads
, version 0.1a 300706
More importantly with CocoaMySQL, they are going to implement SSH tunnelling, which is great news as this was a problem I found when trying to connect up to MySQL databases on some external hosts, that being, you can't connect :-)