I'm now a proud user of Digsby, an all-in-one instant messenger client with one major twist: It does social networking, too.
Now when I login with my one
Digsby account I see a panel of all the following services I subscribe to:
Digsby lets me stay up-to-date with all of these sites without ever having to visit them. I can even Twitter from the client. The interface is extremely customizable and, best of all, is ad-less.
This is my "social networking portal" - my bird's eye view on my interpersonal landscape.
Now if only I could get it on my phone ...