I've had this site running drupal since august 2006 but over time I've reduced the modules in use to almost nothing. There's nothing on the site that needs to be dynamic any more.
So I decided to migrate it to a static site generator - which means that the site is a lot easier to serve, requires far less maintenance and can be easily stored under version control :)
I've tried nanoc before - it works but I find the documentation on extending it a bit opaque, so for this site I've gone with middleman. It seems to work well and I find that writing the few small extensions I need has been easy.
I've added apache redirects from the old drupal URLs to the new site - so I hope that google links etc will work. If not - let me know :)