Our site has four main areas, all done by special developed software for making a wedding budget, a wedding checklist, wedding guest list and gift registry. Also, there's a forum / community and a LOT of articles and videos.
Main difference between our site and "all the other weddingsites" is that our WeddingTools software is INTELLIGENT. It learns from the users, so when a user inputs something in her budget, that noone else has, the system learns it and passes it on to all other users that might need it. It also takes care of alerting the user if they might be doing something wrong, late or perhaps too expensive.
Also, being a membership site, it relies heavily on being a COMMUNITY where brides help brides. It's almost "brides only" as grooms doesn't care about online planning and contrary to having a wedding planner (person) doing it all for you, the brides lean onto each other here for support, knowledge and help.
The logo must show these two things - "intelligent software" and "community feeling"