This Python script converts weblog posts made with the Blogger.com service to blog-type posts for Drupal. The archives contain the script, a template that you'll have to use for Blogger and a usage guide.
It also converts comments and it preserves date/time information for both posts and comments. User information for posts (though not for comments) can be converted to Drupal too; for this to work the Blogger users that are to be converted must already have a Drupal account.
This is my Blogger weblog and here was (before my server went dead and I had to reinstall everything and didn't get down to doing this again) the Drupal version with the imported Blogger posts (both Dutch).
If there's any problems or if you have a question you can always try and contact me (see the guide) and I'll see what I can do.