I know Erel has post a great tutorial on how to connect to remote MySQLDB using httputils2.
I have elaborated on this and given a PHP script I have build (mysqltunnel.php), I've written a class which gives a working DBMySQLConnection/DBMySQLDataset/DBField. There is also a B4A demo to show you to work with this. Of course you need to put the mysqltunnel.php in your PHP/MySQL server.