Add Calendar Event from Email?

Is there any way to add a calendar event from an Email?
I'll get an email about some meeting that is coming up and it says "be there at 3:15 pm on Tuesday May 5th". It seems like it would be really easy to have a feature that recognizes a date in the email, and let me add it into my icalendar. It would be sort of like how the iphone recognizes a phone number and lets you call it from a website.
And yes I guess I could train my brain to be able to memorize something for the 3 seconds it takes to close the email and open the calendar, but isn't the iphone all about not having to think?
thanks