Issues in the Atonement - Federal headship and forensic Imputation

A friend of mine (the unnamed one) pointed me to Dominic Bnonn Tennant's blog, "developing the mind of Christ." Dominic has started a really excellent series: "On the atonement." He opens the discussion with "federal headship and forensic imputation." He promises seven parts in the series, and I'm really looking forward to it. (Of course, it helps that he cites yours truly in part 1.) :-)