A few domain registrars are now offering free 1-year .info domain registrations, limited to 25 domains per registrant. The registrars I am aware of who are offering this deal are Domaindiscount24, Domainsite and NameSecure. I am not totally sure, but you may not be allowed to register more than 25 free .info domains in total (25 at NameSecure + 25 at Domainsite = 50). Anyway, 25 free .info domains is an offer you can't refuse. Many registrars are also offering .info domain at special low prices.

Be fast, because this is a time limited offer. Domaindiscount24 says it is valid until september 30th. Other registrars may have other time limits.