I would like to know how Tom runs myspace.
I think I would like to know how, and start one of my own.

I tried a lot search engines to search for Build Social Networking.
I tried some sites, like Ning, Kickapps, goingon, and elgg.
Which one or any social networking sites will look like Myspace, and act like myspace?

social networking is a huge growing field. If you want to understand the ins/outs you probably need to talk to some web developers. There are a ton of social networking websites out there these days.

Other ms alts:

Facebook.com
Linked In