Are you are power networker using all upcoming apps and services as beta user trying to find out if it will be useful to you? Why should you do that? I don't know, but I can tell you why I am doing exactly this!
I am using several services to get information, to follow people, to get into contact with others. The main reason for me is curiosity. So, I really liked by foursquare badge I got when visiting the computer history museum in Mountain View, California the other day.
But there is another reason why I am doing this. I believe that transparency because of using many services and link them together will lead to better understanding of each other and to a better world in a long run.
The third reason why I am using many apps and services is because I try with my startups to come up with something new. This means I have to know what is already there.
So, I am using many apps and services since many months. Because I am using keepass for all of my passwords I know that I am registered at about 2800 sites. And thanks to Facebook I found out that over time I have connected 450 apps to my facebook account. Because there is a trend to interconnect apps and services there are more and more APIs and mashups. To get an impression you should look at ProgrammableWeb.
So, you and many others out there are helping me to not get lost in social media. You give feedback whenever something went wrong. Thx for sharing!