Binding .live() to document.body

Binding .live() to document.body

This has been discussed before but I was just curious if this would
affect anyone negatively. I'd like to make this change so that less
bubbling has to occur (both documentElement and document no longer
have to get hit).
Roughly, the line in the .live implementation would end up being changed from:
jQuery( this.context )
to:
jQuery( this.context.body || this.context )
(Thus it would only use the body element on HTML documents, as well.)
--John