From Nilsen Labs:
GogTasks is a tool that synchronize Outlook tasks with Google Tasks. It may very well be the last piece of the puzzle that make your tasks available everywhere, all the time. Using Google Tasks as the center of the hub, GogTasks allows you to store your tasks "in the cloud", while working with them through the rich user interface of Microsoft Outlook. Google Tasks is chosen as the main service for the tasks because it is available on practically every platform there is - and now also Outlook.