The bloo.config.php file is very important as it stores the database connection information for your blog. bloo.config.php is not there out of the box with bloo; you need to rename the bloo.config_template.php file that comes with the bloo installation to bloo.config.php
A typical bloo.config.php file might look like this:
<?php
/* Important: this file should be edited and renamed as bloo.config.php */
/* Specify basic database connection information below */
/* the $_server parameter is usually "localhost", although it will
sometimes be a server name. Check your webhosts mysql server
specification. If you're not sure what that means, just leave
this as "localhost" and you'll probably be ok */
$_server = "localhost";
/* put your database name, userid, and password here
(note: remove the "<", ">" characters) */
$_database = "my_bloo_db";
$_userId = "db_user";
$_password = "p4ssw0rd";
/* the name of the list table should go here. This table stores
the settings for your Bloo blog. Prior to installation, to specify
a table prefix different than "bloo_" for your tables,
change the name below to "<table prefix you desire>_list". */
$_settingsTable = "bloo_list";
?>
Notice that the tables in a bloo database have a dynamic prefix. By default the prefix is "bloo_", but if you set the $_settingsTable parameter to another table prefix (for instance, myblog_list), all the tables will be prefixed with that same prefix (in our example, "myblog_").