I know it's not tradition but is it tacky to put an e-mail address on the RSVP card. I was just thinking that in this technological age we might increase our response rate and the speed of response if we include an e-mail address. It's also more "green". And it would save on postage and envelopes. I could still include a traditional RSVP card for the recipients that would not be comfortable with e-mail (like my grandma).
What does everyone think?