I normally use evernote on my android phone. It would be really useful to be able to insert the current date and timestamp by touching a button. It would be a good feature to be able to select default format in evernote settings, and just insert date and/or time stamp by demand (hopefully not both at the same time, one button for each). This feature should also be included in a new note using the widget (this interface for a new note is really poor, I use it to type a fast note but I usually need to write the current date or time stamp).
I hope you include this feature.