I added a function to my bashrc to render to markdown that I could reuse in Vim. :)

to_markdown.sh

#!/bin/bash

# I renamed Markdown.pl to markdown for simpler typing.

function to_markdown() {
    local src="${1}"
    if [ -z "${src}" ]; then
        echo "no source"
        return
    fi
    if [ ! -f "${src}" ]; then
        echo "src doesn't exist"
        return
    fi
    if ! which markdown &>/dev/null ; then
        echo "Markdown not installed"
    fi
    src="$(python -c "import os; print os.path.abspath(\"${src}\")")"
    dest="$(echo "${src}" | sed 's/\.md$/.html/g')"
    
    # adding some style
    echo "<style>" >> "${dest}"
    cat "${HOME}/md.css" >> "${dest}"
    echo "</style>" >> "${dest}"
    
    markdown "${src}" --html4tags >> "${dest}"
}

I just realized that the Markdown.pl script doesn't add css. :( So, I added a few lines to prepend a nice markdown stylesheet.