Wedding Invitation Proper Etiquette Web Address On Card?

[jazzy]

So my fiance and I are going back and forth on this subject. Our invitation is of a formal type and when you turn the card over, the map is on the back. Well under the map, I want to put www.wedding addy.com but she says no. It's on the back and under the map and it's basically a window into our life, we've been tracking everything since we got engaged. I think it's totally acceptable, but she says its tacky, Any opinions?

[Kate]

Hmm.... we put our wedding website on the invite, in little letters. However, our wedding website contains only information relevant to the wedding and a few details about the people in our wedding party. (They come from different places, so we thought it would be nice for them to see each others names/faces.)

Personally, I don't see anything wrong with it, but our wedding is super casual, so perhaps there is some very formal etiquette that I've never heard of.