Point taken, but the goal of Socialibrium isn't to help you stay in touch with the friends you speak to every day -- the friends for which it would be odd NOT to speak with them regularly. It is to help manage the next circle (or circles) out.
I know I have several groups of friends with whom I don't have regular contact, but with whom I want to reach out to every few months just to say hello. These are the people I have trouble tracking whether it has been 1, 2, or even 3 months; and ore often than not, it has been longer than I would have liked (e.g. my best friend from high school). Facebook is great, but not all my friends are on social-networking sites, and status updates only go so far.
At the end of the day, not every app is for every person, but what we have found, is the people who think they need this the least, are actually the ones who need it the most
Also, I know there are multiple times throughout the day when I want to find a conversation thread but I'm not sure whether it originated in an email, a phone call, or an SMS. Socialibrium puts all your conversations with each contact in one place, so you can quickly find what you need (especially key on an iPhone w.o search functionality)
Clearly I am biased,

but would encourage you to give it a try and once you've used it, let us know what you think.
Thanks.