I would like to get input from an interactive dialog that uses Manipulate[]. But I find that my Manipulate[] breaks when I put it inside a DialogInput[]. So, when I try DialogInput[Manipulate[Plot[Sin[e x], {x, 0, 2 \[Pi]}], {e, 1, 10}]] the plot inside the dialog is not connected to the Manipulate[] slider. What am I missing here?

Try using global variables. Return the value with DialogReturn.
res = DialogInput[{

• Nice. This may be the first practical use I've seen of LocalizeVariables -> False. – Mr.Wizard Feb 21 '12 at 23:05