This is second of a number of updates regarding the transition of the IN-ADDR.ARPA zone.
As of today, the 23rd of December 2010, ARIN commenced a process of transferring the zone data and zone configuration data to ICANN via a secure channel. This upload occurs daily and paves the way for the next steps in the transition process.
In the coming weeks, this data will be validated, and imported into ICANN systems, republished on a non-authoritative nameserver, and tested for consistency. Details of the available nameserver will be published soon.