wordpress migration시 user password는 안됨. 이메일 암호복구 이용...펌

WordPress gives much info on Drupal to WordPress conversion. Here are several tutorials and plugins on importing content to WordPress: http://codex.wordpress.org/Importing_Content#Drupal

Before the import, backup your sites (WordPress and Drupal) and use the development server, not a live site.

Also, note that when you import users, importing their passwords is totally different story. The information is encrypted and not migrated, so you'll need to use a password recovery tool to send new passwords by email.