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I like taskpane. User will feel amazing if they can look up customer database and get the customer data into Office documents from taskpane.
Hi AndyK, Yes, task pane is a good place for user action/interaction and it's very easy for developer to create custom task pane now. However, I found this area is too small and we have to think about what we can place here carefully. Well, pop up a new dialog window inside Office doc/xls is still a good choice, like various Office-dependent products do nowadays. Colt Kwong
Yes, task pane is too small if using 4:3 display, but if you are using wide screen, it will better and just like sidebar in Vista! :D