Based on customer feedback: there should be a property that limits the maximum height of the input of AutoCompleteBox.

Once that height is reached, a scrollbar should appear.

It would be helpful if there was a built in way for a token to be a linked item.  This could be done through an ItemTemplate or a NavigateURL property on an Entry.

Currently, when the InputType=Text and AllowCustomEntry is set to true, the AutoCompleteBox does not persist the value of the entry when an item from the dropdown is chosen. 

Occasionally, instead of a single request the controls will make multiple requests to the service.