AMEN! I wish I could help, but I know nothing,....other than the fact that one needs to be done. Rainlendar is the closest thing I've seen, but it lists all of the todo in your Outlook file...there is no option to select by date or category.
And clicking on an item opens Rainlendars edit window not Outlook's window.
It would be AWESOME to see something like PocketBreeze http://www.sbsh.net/products/pocketbreeze/ on the desktop of my PC.
You would think that porting back something like Pocketbreeze from WindowsCE to Windows wouldn't be too hard.
A widget like this would be invaluable.