Wordpress to Blogger Redirector
This uses rack to redirect Wordpress url's to Blogger urls. Using Heroku with this very simple rack app will redirect most of your old Wordpress links to Blogger links.
You will just need to change config.ru to customize it for your domain.
See a detailed tutorial at: http://www.christopherslade.com/2011/10/migrating-from-wordpress-to-blogger.html