Converting Drupal Posts
You can use octopress drupal module to export Drupal nodes to Octopress. It is a straightforward process. This module will generate octopress post files.
I moved comments to disqus. I exported Drupal comments using disqus migrate module as an XML file. Then import them in Disqus.
I really like Octopress so far. Writing posts in favorite text editor in Markdown is quick. Drupal feels too heavyweight for light blogging. Now There is 0 maintenance required for my personal blog :-).