A really cool site! And Portal!!
Here is a site similar to monster, only it is for online work. You don't need to be a certain age, and you'll get paid over the web. It is mostly for jobs writing on internet game review sites. Trust me, it is a must to check it out.
When you bring up the site, type LOGON. Then it will ask for a username. Just typing in a new username will create one. If it allready exists then you will get a prompt to make a new one. But since this is such a little known site, I doubt you'll get one. After that you'll get a prompt for a password. The password is always PORTAL. Once you have succesfully logged in, type APPLY to begin filling out the application.
You will be contacted for a job through your username, so be sure to log on every few weeks to check it out.
Also, if you're not looking for a job, they have a ton of wicked cool games after you fill out the application. This site is how I found CC. They have a ton of awesome freeware games so YOU HAVE TO CHECK IT OUT!!
http://www.aperturescience.com/
EDIT- Another thing, you don't have to fill out an email address or anything to sign up. Just type in a username and then you'll immediately start a new account. HOORAY for no hassle!!
EDITEDIT- If you haven't already realized it, this is a site that promotes PORTAL. Check it out:
http://www.youtube.com/watch?v=if3Qv2tHyfA