One of the more recent trends, personal wedding websites, is a great thing for a couple to do. While there are a lot of great programs out there, often with companies like Weebly you can do it yourself and often at low cost or for free.
The key with your site is to not make it too complicated. Wedding websites are for information, directions, itinerary, links to gift registrations, the couple’s story, hotel info, etc. They are a great way to post about changes also. When looking for a wedding planner, the ability to create and manage your site for you is one of the things they should offer.