I recently came across some interesting software CRM4Mac which delivers a higher level of integration of Apple apps than iLife et al. It also hints at the possibilities of Leopard integration, but I'm not convinced that Apple will deliver in Leopard those things which are possible even now in Tiger. Time will tell.
CRM4Mac brings information on People and Companies from AddressBook together with email info from Mail and todo's and dates from iCal into one viewable place. But...and it's a big but, it leaves the info in place in the Apple apps so that each continues to be the receptacle for that kind of data. What it adds to the party is a Project database (albeit a small one), which gives it the "Customer Relationship Manangement" in its title. User defined projects are linked with people and emails and people are already matched by date automatically. It is a really great connection which is only let down by the awkward date list view which I find too list-like for a Mac app.
