How do I create a website that people can interact with each other, like Myspace or Yahoo!?

Question

What software and or programs would I need to use? I'm familiar with building websites, but not networks.....?

Answer 1

For this you can use much programs but the very simple is to search for a content management system write in PHP
Some links there
phpbb
http://www.phpbb.com/
vbulletin
http://www.vbulletin.com/
phpnuke http://phpnuke.org/
drupal
http://drupal.org/
http://drupal.org/
Aldso if your site offers support you can use Ruby
It is new but very spectacular
http://www.rubyonrails.org/
For a bloging or podcast system you can use Word press
http://wordpress.org/
Respecting the language search the web for "making portals" or content manegement systems

Answer 2

how many more of those do you think the web needs. there's probably atleast a hundred now.