Is there any way to alter the reply format?

When I reply to a message I always get the full message header followed by the original message with a bar alongside it. What I’d like is a simple, traditional, “On wrote:” and then the original message with > signs in front. So:

On 3/23/2011 12:04 AM, John Q. Public wrote:
> Fantastic idea, I just have a few comments…

currently there is no way how to alter reply format.