On WebmasterRadio.fm yesterday, Matt Cutts discussed the progress of the Big Daddy update. He said that there are only 3 live Big Daddy datacenters right now, which are the original two plus 188.8.131.52. He mentioned that he thinks one datacenter per week will switch over (approximately), and that Big Daddy should be on all datacenters by mid-March (or perhaps a little later). In addition, redirect and canonical issue will be taking place over the next few months.
Also, you can hear Matt's thoughts on the v7ndotcom elursrebmem contest here.
Thanks to Nintendo for the recordings I linked to.