This is the real deal where register.com offer 1 year free domain name.
It’s free TLD (Top Level Domain) and not the usual subdomain you get from co.cc.

Register.com is offering on domains for the first year for free.

You can sign-up here

I have got my new domain http://www.homestic.com

Currently I parked as Google Adsense domain.

After you register the domain make sure you shut off auto renew

After 60 days you can transfer the domain to another domain registrar to avoid paying their high fees after the first year.

You must have a credit card to sign-up, just be sure to cancel the auto renew so you will not forget in a year and be charged for the renewal

Noted : Offer ended as Nov 11 2009