Taken at face value, this could suggest 4 new iMac configurations and 2 new Mac mini configurations. At this point, however, that is speculative and the report remains largely unconfirmed.
Both the iMac and Mac mini are long-overdue for a refresh, and recent signs have suggested that inventory of current-generation iMacs and Mac minis may be fading fast. In particular, supply of the 3.06GHz iMac has dried up at all of Apple's largest U.S.-based resellers, including Amazon.com. Meanwhile, Best Buy online has run out of both (1, 2) existing Mac mini configurations.