Craig Newmark, founder of Craig’s List and all round good bloke, says in his blog: 

SCAM: site faking craigslist
Just to let people know in a hurry, the site
www.pay-craigslist.org
has no relation to us, and we’re escalating dramatically now.
Please get the word out.
Thanks!

You’re welcome, Craig.  And thanks to you for a great service.