Even better - not often you get Tumblr included :)

"tracks what kind of software or games you use, and lets you create your own software profile." You can then share your profile for no good reason at all. This is very much a good, if limited, idea with 'social' tacked on.

Broadcast yourself. Watch and share your videos worldwide!

if all your information is tailored to what you want to know, you may miss that which you don't know you want to know, and should.