I'm just curious how other php coders would design a system where guests would submit something to go on a site. Would you have a special field for if its validated or not? and once the user clicked submit then you'd insert it in the mysql table as notvalidate? or Would you do something different... I'm interested to hear your result....

Depends what the site is. If its not that important you can make it like a web forum or a shoutbox and just have it go on the site, otherwise ya just make a seperate column in the DB and make it a 1 if it should showup on the site and a 0 if it shouldnt or if the admin hasnt validated it yet.