DDBJ has started to mirror the NCBI RefSeq data from August 23, 2010.
You can download the RefSeq data from DDBJ's Anonymous-FTP site (ftp://ftp.ddbj.nig.ac.jp/mirror_database/refseq/release/).
The directory hierarchy under "/release" is the same as that of NCBI.. The update is scheduled about twice times a month.