I know that I am a little late in responding, but I just couldnt help it. Here are my thoughts:
1. E-cards are perfectly acceptable. They are environmentally friendly and a quick and economical way to keep in touch.
2. Several years ago, the stress of the holidays got to me and SOMETHING had to go. I chose holiday cards. If I want to keep in touch, and vice versa, then I will, but there is just TOO much going on during holiday time. The stress of having to do a card was making it a chore, and it should be something I wanted to do, not something I HAD to do.
3. If people love you, and are happy to hear from you, then any method should be acceptable. This is a technological age and as nice as cards are to receive, anyone who thinks that they e cards are "tacky" must have LOTS of time on their hands and $$ to send paper cards! Dont worry about what others think. You know that everyone will have an opinion and some will like it, some will not. Do what YOU want to do and remember the true spirit of the holiday season. If keeping in touch is your goal, who cares if you do it electronically, via snail mail, or by carrier pigeon!! It is the fact that you DO it that is important. Happy Holidays!