Michael Kruse has been blogging on the meaning of kephale. He has another post up on the topic today. The discussion is critical to whether or not God intends husbands to have a position of heirarchical authority over their wives.
Please word posts and comments so that they reflect biblical character (such as "speaking the truth in love", Eph. 4:15). Do not speculate about the motives of others for believing as they do. Refrain from using sarcasm. Focus on issues, not personalities. Avoid generalized statements which you do not support with evidence. Comments which do not follow these guidelines may be deleted without warning or explanation.