I'm contributing a new module for Drupal 7. I hope it helps you starting a fresh website for your L2J Server. The posibilities are unlimited. Like Facebook Connect building web applications but L2J :D
This module allows users to login on a Drupal website through L2J Server using a L2J account.
In the first release, L2j Connect converts your Drupal Installation in a robust Account Manager, creating and editing accounts.
L2j Connect was aproved & tested by the Drupal Community and now is under active development.