twistcabbage:public petercossey$ drush si --sites-subdir=peter.bangbuild2.local --db-url="mysqli://root:un53cur3@localhost/bang2" bang --verbose
Initialized Drupal 7.0 root directory at /Users/petercossey/local_httpd/peter.bangbuild2.local/public                               [notice]
You are about to DROP your 'bang2' database and then CREATE a new one. Do you want to continue? (y/n): y
Sites directory sites/peter.bangbuild2.local already exists - proceeding.                                                           [notice]
Initialized Drupal site peter.bangbuild2.local at sites/peter.bangbuild2.local                                                      [notice]
Calling system(mysql --database=information_schema --host=localhost --user=root --password=un53cur3  < /private/var/folders/Mc/Mc1csE2aEGa56VZqTyfqp++++TI/-Tmp-/phptpxTKE);
Starting Drupal installation. This takes a few seconds ...                                                                       [ok]
WD system: user module installed.                                                                                                     [info]
WD system: user module enabled.                                                                                                       [info]
WD system: filter module installed.                                                                                                   [info]