Yes, I definitely agree that I need a better lock than just the fork-lock... I actually am in the habit of using two locks, a strong U-lock and a good cable lock, because I am paranoid of somebody carrying it away (had two mopeds stolen a few weeks ago).
I just thought it would be kind of cool to use the original fork-lock as well... if it's not too much to get a key made, it might be worth it as added protection, and just for the nostalgia of it so to speak.
Nick