STD email??? opinions please!

In the interest of saving some money, I thought about possibly doing a save the date email.... I had gotten an email from the knot, which is what gave me the idea...It wouldn't just be a regular email, it would be formatted nicely, etc. But, is that completely tacky and cheap? I wasn't going to do STD's at all, but when I saw this, I thought it was kind of a fun idea....thoughts anyone? Is anyone else doing this? Help!!!!

never heard of it before, but why not?

If your guests are the kind of people who check their emails, then I'd say go for it.

I can't imagine sending emails to all the old Italian people coming to mine! HAHAHA most of them don't have computers.

But, like I said, I think it's fine, if your guests are email people.