Posted 03 February 2009 - 03:36 PM
The easiest method might be to create an XML feed on the web site that can only be viewed by the restaurant (using an IP address check perhaps) containing orders. On the restaurant computer, set up a feed reader that can check that feed every x minutes. This will notify the staff as soon as orders are placed. Different readers can be found with different options for notifications, and how frequently they check for updates.
If you want to go with a more advanced option, you could create a simple Java or C# application that will sit in the taskbar and every x minutes check the site for new orders, popping up a notification when it detects something. This would give you full control over the information available to the staff, the type of notification, etc.
The only way to learn anything is to question everything.