Outlook 2013's Active Sync support "fixes" this problem - task sync to Outlook.com and to the mobile devices that sync with Outlook.com.
We get the occasional question asking when the Outlook Connector will support syncing Tasks with Hotmail. Over the past several weeks, I've had several users ask if the Hotmail Connector is going to sync tasks, since Windows Phone "Mango" now syncs Hotmail Tasks.
No, the Outlook Hotmail Connector will not sync Tasks to Hotmail Live accounts. At this time, there are no plans to add task syncing to the Connector.
Syncing with Mango will be between Hotmail and the device directly; it won't go through Outlook.
At this time, I'm not aware of plans by Microsoft to develop a desktop sync utility for syncing between Outlook and Windows Phone. However, any sync tool that is made available would come from the Windows Phone product group or a 3rd party, not from the Outlook product group. Outlook just provides the data source for any sync process - it doesn't handle the sync.
Use AkrutoSync to synchronize your Outlook Contacts, Calendar, Tasks and Notes directly with any Android, iOS (iPhone or iPad) or Windows Phone devices. AkrutoSync runs on your computer, not in the cloud. The program works with the phone's built-in apps, so there are no additional apps to install on the phone. After the initial set-up, the program syncs automatically. It works over Wi-Fi or the Internet. Akruto syncs Outlook with unlimited number of phones and tablets even if they are different brands and operating systems. Synchronization history feature lets you restore data if you change or delete something inadvertently.
This Windows Phone task management tool allows you to sync your tasks directly to Outlook. You can create or edit your tasks on your phone and sync them down to outlook, or create them on outlook and sync them to your phone. Recurrence information is supported as well as reminders on your phone.