I was asked at last night's event if it will be possible to work with the actions / task pane in Outlook in the 2007 release of Office. The good news is that custom task panes are supported in Access, Excel, InfoPath, Outlook, PowerPoint and Word. Here's a simple example of a custom task pane in Outlook 2007 (click to see full size).
I don't know why I named my custom task pane "Wibble". I just did.