This script takes your Hg queue, unwinds it and applies each and every queue separately. It then generates a patch to a local directory of the qtip, applies the next queue item until it's back to where it started (all queue items applied).

qpatches.bash

#!/bin/bash

# Author: Mike de Boer <mdeboer AT mozilla.com>
# This script takes your Hg queue, unwinds it if needed and applies each and
# every queue separately. It then generates a patch to a local directory of the
# qtip, applies the next queue item until it's back to where it started.

_gen_patches() {
  local i len
  local patches=($(hg qapplied 2>/dev/null))
  len=${#patches[@]}
  if (( len>1 )) ; then
    hg qpop -a > /dev/null
  fi
  # go through the array in reverse order
  for (( i=0 ; i<len ; i++ )) ; do
    patch=${patches[i]}
    echo "Generating patch for queue item ${patch}"
    if (( len>1 )) ; then
      hg qpush ${patch} > /dev/null
    fi
    # I save patches to my homedir, but feel free to change the patch output path
    # to whatever you want.
    hg export qtip > ~/Patches/${patch}.patch
  done
}

_gen_patches "$@"