A keyboard shortcut to insert today's date and/or time would be useful. If a keyboard shortcut is not feasible, an item on the right-click menu would be good. And if that is not possible, an item on the regular menu (perhaps under quick options?) would be better than nothing.
And it would be really good to have a choice of what is inserted (for example, date vs. date and time). See Homesite, where it was on the right-click menu and gave four choices.