What is needed to convert a plugin to multisite?
Is it sufficient to:
1. add the blogid to the plugins database table names like
$wpdb->prefix . $blog_id . 'my_tablename' as opposed to
$wpdb->prefix . 'my_tablename'
2. and make upload directories for each blog? If so, where should i put the uploads? In other words: what is the multisite equivalence of wp-content/uploads/ ?
Are there more things i should be aware of?