NAT - Ability to Use Route Maps with Static Translations

Previous to this feature, route mapping was supported only with dynamic Network Address Translation (NAT) translation.

The NAT—Ability to Use Route Maps with Static Translations feature enables NAT multihoming capability with static address translations. Multihomed internal networks now can host common services such as the Internet and Domain Name System (DNS), which are accessed from different outside networks. 

Ref:http://www.cisco.com/en/US/docs/ios/12_2t/12_2t4/feature/guide/ftnatrt.html