Need a good pre-written tutorial Dungeon for 4th Edition

I'm starting a D&D campaign for 4th Edition, and I have a lot of new players. The thing about my story is, I have a lot planned for after the events of a simple mission given to the party. I can set things in motion afterward, but I need something simple and easy to start out. I was wondering if anyone knew of any super simple, basically a tutorial, mission or quest for new players. Pre-written would be great, but just some ideas thrown around would be helpful too.

I hope this isn't too late, but i highly recommend "The slaying stone." its a pretty modular story with a simple find the macguffin set up.