Amy asked for a defintion of Body Church so here are some thoughts... Yes, body and church are quite redundant and basically synonymous in the New Testament. The problem is the definition of church has changed over the past 2000 years and no longer means anything close to what a body is.
A quick definition is a body church is an interdependent, interconnected group of Christians that have committed to one another to form a single body under the headship of Christ sharing the same mission, united by love and experiencing the full release of equally valued spiritual gifts (1 Cor. 12).
Those of us who have been on this journey from day one feel we have become less of a body lately and are less interconnected because our structure has made it more difficult to grow more toward body life as we grew in size.
Body churches also must be receiving 5-fold ministry (Eph 4) and be under the protection and oversight of the city church (Acts 20). One thing we've done well lately is the creation of a city church that can now support multiple bodies but this is a new concept (yet all over the New Testament - i.e. Romans 16) and we are trying to figure out how this works as well.
We believe that every Christian must identify with church on 3 levels -
1. Body
2. City
3. Universal
That's just a general overview but hopefully it helps.