Me and a friend are going to be working on an iPhone app that is going to be sending and requesting a lot of information from a 24/7 server (a 2009 Mac Mini). There's going to be a lot of realtime information floating around, and we're not sure what a robust database solution for that info would be. We're essentially looking for a db that's really fast and powerful, but still pretty simple to use, especially since we'll be accessing it from Objective-C, which is still pretty new for us. Is Sqlite what we're looking for? A colleague of ours suggested using PostGres, but isn't PostGres pretty dated?
SQLite is great for the iPhone side. Are you asking about that or the server?