I'm looking for an app to make lists (grocery lists, chores, movies to see, whatever) and I know there's a ton of apps like that out there. So here's the twist - I'm looking for one where my fiancee and I can both access the same pool of data and create/modify lists. It'd be awesome if it had a web interface to go along with the iPhone app. It would need to update so I can see her changes and she can see mine. Right now, I'm considering Basecamp but it doesn't really feel like the right tool. I'd like for us to have our own separate logins if possible. Is there anything out there like this? Surely I'm not the only person who wants something like this.