Netmark,
the argument i have heard is that Rom 6 has nothing to do with the mode of baptism because burials in those days were much different. Jesus was not buried but put side ways in a tomb.

The other way to look at Romans 6 is that the "baptism" talked about is not a water baptism but the baptism of the holy spirit. It is not water that unites us to Christ but the regenerating work of the holy spirit. This also clears up the baptismal regeneration issue that often comes from this passage.

As i said in my email, baptism does not represent our being buried and resurrected with Christ but the work of the spirit.
Rom 5:55 and hope does not put us to shame, because God's love has been poured into our hearts through the Holy Spirit who has been given to us.
Titus 3:5,6 he saved us, not because of works done by us in righteousness, but according to his own mercy, by the washing of regeneration and renewal of the Holy Spirit,6whom he poured out on us richly through Jesus Christ our Savior,