Once seized, they generally point them at the server at 74.81.170.110 which hosts their seized image. Thus using a simple reverse IP lookup we can see a list of all seized domains: http://viewdns.info/reverseip/?host=74.81.170.110
wow that's pretty cool. Looks like everything from that list was in November. Also looks like the majority of the sites were selling prescription drugs.
those dates do not reflect when a site was initially seized. For instance, Filespump.com was seized in 2012 and lulzsec.com was seized in March. Both say November according to this list.