Hello tommyl - you need to input a Payment Address on your Account Details page for your Litecoins to be sent.
Once you've done that, payouts should be every 40 minutes as long as your "Current Confirmed balance" (shown on the left hand panel on the site when you're logged on) is greater than your "Automatic Payout" minimum (shown in your "Account Details" page).
Apologies by the way to everyone for the downtime earlier today - caused by more email spam clogging up one of the logs.
Oh, look at that.. I thought I entered my LTC address, but I guess not.. Thanks!